1 This file contains a description of all the shell variables whose value is
2 determined by the Configure script. Variables intended for use in C
3 programs (e.g. I_UNISTD) are already described in config_h.SH. [`configpm'
4 generates pod documentation for Config.pm from this file--please try to keep
5 the formatting regular.]
8 This variable defines the extension used for ordinary libraries.
9 For unix, it is '.a'. The '.' is included. Other possible
10 values include '.lib'.
13 This variable defines the extension used for executable files.
14 For unix it is empty. Other possible values include '.exe'.
17 This variable defines the extension used for object files.
18 For unix, it is '.o'. The '.' is included. Other possible
19 values include '.obj'.
22 This variable is set to 'true' if AFS (Andrew File System) is used
23 on the system, 'false' otherwise. It is possible to override this
24 with a hint value or command line option, but you'd better know
27 alignbytes (alignbytes.U):
28 This variable holds the number of bytes required to align a
29 double-- or a long double when applicable. Usual values are
30 2, 4 and 8. The default is eight, for safety.
32 ansi2knr (ansi2knr.U):
33 This variable is set if the user needs to run ansi2knr.
34 Currently, this is not supported, so we just abort.
36 aphostname (d_gethname.U):
37 This variable contains the command which can be used to compute the
38 host name. The command is fully qualified by its absolute path, to make
39 it safe when used by a process with super-user privileges.
41 api_revision (patchlevel.U):
42 The three variables, api_revision, api_version, and
43 api_subversion, specify the version of the oldest perl binary
44 compatible with the present perl. In a full version string
45 such as '5.6.1', api_revision is the '5'.
46 Prior to 5.5.640, the format was a floating point number,
48 perl.c:incpush() and lib/lib.pm will automatically search in
49 $sitelib/.. for older directories back to the limit specified
50 by these api_ variables. This is only useful if you have a
51 perl library directory tree structured like the default one.
52 See INSTALL for how this works. The versioned site_perl
53 directory was introduced in 5.005, so that is the lowest
54 possible value. The version list appropriate for the current
55 system is determined in inc_version_list.U.
56 XXX To do: Since compatibility can depend on compile time
57 options (such as bincompat, longlong, etc.) it should
58 (perhaps) be set by Configure, but currently it isn't.
59 Currently, we read a hard-wired value from patchlevel.h.
60 Perhaps what we ought to do is take the hard-wired value from
61 patchlevel.h but then modify it if the current Configure
62 options warrant. patchlevel.h then would use an #ifdef guard.
64 api_subversion (patchlevel.U):
65 The three variables, api_revision, api_version, and
66 api_subversion, specify the version of the oldest perl binary
67 compatible with the present perl. In a full version string
68 such as '5.6.1', api_subversion is the '1'. See api_revision for
71 api_version (patchlevel.U):
72 The three variables, api_revision, api_version, and
73 api_subversion, specify the version of the oldest perl binary
74 compatible with the present perl. In a full version string
75 such as '5.6.1', api_version is the '6'. See api_revision for
76 full details. As a special case, 5.5.0 is rendered in the
77 old-style as 5.005. (In the 5.005_0x maintenance series,
78 this was the only versioned directory in $sitelib.)
80 api_versionstring (patchlevel.U):
81 This variable combines api_revision, api_version, and
82 api_subversion in a format such as 5.6.1 (or 5_6_1) suitable
83 for use as a directory name. This is filesystem dependent.
86 This variable is used internally by Configure to determine the
87 full pathname (if any) of the ar program. After Configure runs,
88 the value is reset to a plain "ar" and is not useful.
91 This variable holds the name of the directory in which the user wants
92 to put architecture-dependent public library files for $package.
93 It is most often a local directory such as /usr/local/lib.
94 Programs using this variable must be prepared to deal
95 with filename expansion.
97 archlibexp (archlib.U):
98 This variable is the same as the archlib variable, but is
99 filename expanded at configuration time, for convenient use.
101 archname64 (use64bits.U):
102 This variable is used for the 64-bitness part of $archname.
104 archname (archname.U):
105 This variable is a short name to characterize the current
106 architecture. It is used mainly to construct the default archlib.
109 This variable defines any additional objects that must be linked
110 in with the program on this architecture. On unix, it is usually
111 empty. It is typically used to include emulations of unix calls
112 or other facilities. For perl on OS/2, for example, this would
116 This variable is used internally by Configure to determine the
117 full pathname (if any) of the awk program. After Configure runs,
118 the value is reset to a plain "awk" and is not useful.
121 The base revision level of this package, from the .package file.
124 This variable is defined but not used by Configure.
125 The value is a plain '' and is not useful.
128 This variable holds the name of the directory in which the user wants
129 to put publicly executable images for the package in question. It
130 is most often a local directory such as /usr/local/bin. Programs using
131 this variable must be prepared to deal with ~name substitution.
133 bincompat5005 (bincompat5005.U):
134 This variable contains y if this version of Perl should be
135 binary-compatible with Perl 5.005.
138 This is the same as the bin variable, but is filename expanded at
139 configuration time, for use in your makefiles.
142 This variable is defined but not used by Configure.
143 The value is a plain '' and is not useful.
146 This variable is used internally by Configure to determine the
147 full pathname (if any) of the byacc program. After Configure runs,
148 the value is reset to a plain "byacc" and is not useful.
150 byteorder (byteorder.U):
151 This variable holds the byte order. In the following, larger digits
152 indicate more significance. The variable byteorder is either 4321
153 on a big-endian machine, or 1234 on a little-endian, or 87654321
154 on a Cray ... or 3412 with weird order !
157 This variable contains the \c string if that is what causes the echo
158 command to suppress newline. Otherwise it is null. Correct usage is
159 $echo $n "prompt for a question: $c".
161 castflags (d_castneg.U):
162 This variable contains a flag that precise difficulties the
163 compiler has casting odd floating values to unsigned long:
165 1 = couldn't cast < 0
166 2 = couldn't cast >= 0x80000000
167 4 = couldn't cast in argument expression list
170 This variable is used internally by Configure to determine the
171 full pathname (if any) of the cat program. After Configure runs,
172 the value is reset to a plain "cat" and is not useful.
175 This variable holds the name of a command to execute a C compiler which
176 can resolve multiple global references that happen to have the same
177 name. Usual values are 'cc' and 'gcc'.
178 Fervent ANSI compilers may be called 'c89'. AIX has xlc.
180 cccdlflags (dlsrc.U):
181 This variable contains any special flags that might need to be
182 passed with 'cc -c' to compile modules to be used to create a shared
183 library that will be used for dynamic loading. For hpux, this
184 should be +z. It is up to the makefile to use it.
187 This variable contains any special flags that might need to be
188 passed to cc to link with a shared library for dynamic loading.
189 It is up to the makefile to use it. For sunos 4.1, it should
193 This variable contains any additional C compiler flags desired by
194 the user. It is up to the Makefile to use this.
196 ccflags_uselargefiles (uselfs.U):
197 This variable contains the compiler flags needed by large file builds
198 and added to ccflags by hints files.
201 This can set either by hints files or by Configure. If using
202 gcc, this is gcc, and if not, usually equal to cc, unimpressive, no?
203 Some platforms, however, make good use of this by storing the
204 flavor of the C compiler being used here. For example if using
205 the Sun WorkShop suite, ccname will be 'workshop'.
207 ccsymbols (Cppsym.U):
208 The variable contains the symbols defined by the C compiler alone.
209 The symbols defined by cpp or by cc when it calls cpp are not in
210 this list, see cppsymbols and cppccsymbols.
211 The list is a space-separated list of symbol=value tokens.
213 ccversion (Checkcc.U):
214 This can set either by hints files or by Configure. If using
215 a (non-gcc) vendor cc, this variable may contain a version for
219 Login name of the person who ran the Configure script and answered the
220 questions. This is used to tag both config.sh and config_h.SH.
222 cf_email (cf_email.U):
223 Electronic mail address of the person who ran Configure. This can be
224 used by units that require the user's e-mail, like MailList.U.
227 Holds the output of the "date" command when the configuration file was
228 produced. This is used to tag both config.sh and config_h.SH.
230 charsize (charsize.U):
231 This variable contains the value of the CHARSIZE symbol, which
232 indicates to the C program how many bytes there are in a character.
235 This variable is defined but not used by Configure.
236 The value is a plain '' and is not useful.
239 This variable is defined but not used by Configure.
240 The value is a plain '' and is not useful.
243 This variable is defined but not used by Configure.
244 The value is a plain '' and is not useful.
246 clocktype (d_times.U):
247 This variable holds the type returned by times(). It can be long,
248 or clock_t on BSD sites (in which case <sys/types.h> should be
252 This variable is used internally by Configure to determine the
253 full pathname (if any) of the comm program. After Configure runs,
254 the value is reset to a plain "comm" and is not useful.
257 This variable is defined but not used by Configure.
258 The value is a plain '' and is not useful.
260 CONFIGDOTSH (Oldsyms.U):
261 This is set to 'true' in config.sh so that a shell script
262 sourcing config.sh can tell if it has been sourced already.
264 contains (contains.U):
265 This variable holds the command to do a grep with a proper return
266 status. On most sane systems it is simply "grep". On insane systems
267 it is a grep followed by a cat followed by a test. This variable
268 is primarily for the use of other Configure units.
271 This variable is used internally by Configure to determine the
272 full pathname (if any) of the cp program. After Configure runs,
273 the value is reset to a plain "cp" and is not useful.
276 This variable is defined but not used by Configure.
277 The value is a plain '' and is not useful.
280 This variable is used internally by Configure to determine the
281 full pathname (if any) of the cpp program. After Configure runs,
282 the value is reset to a plain "cpp" and is not useful.
284 cpp_stuff (cpp_stuff.U):
285 This variable contains an identification of the catenation mechanism
286 used by the C preprocessor.
288 cppccsymbols (Cppsym.U):
289 The variable contains the symbols defined by the C compiler
290 when it calls cpp. The symbols defined by the cc alone or cpp
291 alone are not in this list, see ccsymbols and cppsymbols.
292 The list is a space-separated list of symbol=value tokens.
294 cppflags (ccflags.U):
295 This variable holds the flags that will be passed to the C pre-
296 processor. It is up to the Makefile to use it.
298 cpplast (cppstdin.U):
299 This variable has the same functionality as cppminus, only it applies
300 to cpprun and not cppstdin.
302 cppminus (cppstdin.U):
303 This variable contains the second part of the string which will invoke
304 the C preprocessor on the standard input and produce to standard
305 output. This variable will have the value "-" if cppstdin needs
306 a minus to specify standard input, otherwise the value is "".
309 This variable contains the command which will invoke a C preprocessor
310 on standard input and put the output to stdout. It is guaranteed not
311 to be a wrapper and may be a null string if no preprocessor can be
312 made directly available. This preprocessor might be different from the
313 one used by the C compiler. Don't forget to append cpplast after the
314 preprocessor options.
316 cppstdin (cppstdin.U):
317 This variable contains the command which will invoke the C
318 preprocessor on standard input and put the output to stdout.
319 It is primarily used by other Configure units that ask about
320 preprocessor symbols.
322 cppsymbols (Cppsym.U):
323 The variable contains the symbols defined by the C preprocessor
324 alone. The symbols defined by cc or by cc when it calls cpp are
325 not in this list, see ccsymbols and cppccsymbols.
326 The list is a space-separated list of symbol=value tokens.
328 crosscompile (crosscompile.U):
329 This variable conditionally defines the CROSSCOMPILE symbol
330 which signifies that the build process is be a cross-compilation.
331 This is normally set by hints files or from Configure command line.
333 cryptlib (d_crypt.U):
334 This variable holds -lcrypt or the path to a libcrypt.a archive if
335 the crypt() function is not defined in the standard C library. It is
336 up to the Makefile to use this.
339 This variable is used internally by Configure to determine the
340 full pathname (if any) of the csh program. After Configure runs,
341 the value is reset to a plain "csh" and is not useful.
343 d_access (d_access.U):
344 This variable conditionally defines HAS_ACCESS if the access() system
345 call is available to check for access permissions using real IDs.
347 d_accessx (d_accessx.U):
348 This variable conditionally defines the HAS_ACCESSX symbol, which
349 indicates to the C program that the accessx() routine is available.
352 This variable conditionally defines the HAS_ALARM symbol, which
353 indicates to the C program that the alarm() routine is available.
355 d_archlib (archlib.U):
356 This variable conditionally defines ARCHLIB to hold the pathname
357 of architecture-dependent library files for $package. If
358 $archlib is the same as $privlib, then this is set to undef.
361 This variable conditionally defines the HAS_ATOLF symbol, which
362 indicates to the C program that the atolf() routine is available.
365 This variable conditionally defines the HAS_ATOLL symbol, which
366 indicates to the C program that the atoll() routine is available.
368 d_attribut (d_attribut.U):
369 This variable conditionally defines HASATTRIBUTE, which
370 indicates the C compiler can check for function attributes,
371 such as printf formats.
374 This variable conditionally defines the HAS_BCMP symbol if
375 the bcmp() routine is available to compare strings.
378 This variable conditionally defines the HAS_BCOPY symbol if
379 the bcopy() routine is available to copy strings.
381 d_bincompat5005 (bincompat5005.U):
382 This variable conditionally defines BINCOMPAT5005 so that embed.h
383 can take special action if this version of Perl should be
384 binary-compatible with Perl 5.005. This is impossible for builds
385 that use features like threads and multiplicity it is always $undef
389 This symbol conditionally defines the symbol BSD when running on a
392 d_bsdgetpgrp (d_getpgrp.U):
393 This variable conditionally defines USE_BSD_GETPGRP if
394 getpgrp needs one arguments whereas USG one needs none.
396 d_bsdsetpgrp (d_setpgrp.U):
397 This variable conditionally defines USE_BSD_SETPGRP if
398 setpgrp needs two arguments whereas USG one needs none.
399 See also d_setpgid for a POSIX interface.
402 This variable conditionally defines the HAS_BZERO symbol if
403 the bzero() routine is available to set memory to 0.
405 d_casti32 (d_casti32.U):
406 This variable conditionally defines CASTI32, which indicates
407 whether the C compiler can cast large floats to 32-bit ints.
409 d_castneg (d_castneg.U):
410 This variable conditionally defines CASTNEG, which indicates
411 wether the C compiler can cast negative float to unsigned.
413 d_charvspr (d_vprintf.U):
414 This variable conditionally defines CHARVSPRINTF if this system
415 has vsprintf returning type (char*). The trend seems to be to
416 declare it as "int vsprintf()".
419 This variable conditionally defines the HAS_CHOWN symbol, which
420 indicates to the C program that the chown() routine is available.
422 d_chroot (d_chroot.U):
423 This variable conditionally defines the HAS_CHROOT symbol, which
424 indicates to the C program that the chroot() routine is available.
426 d_chsize (d_chsize.U):
427 This variable conditionally defines the CHSIZE symbol, which
428 indicates to the C program that the chsize() routine is available
429 to truncate files. You might need a -lx to get this routine.
431 d_closedir (d_closedir.U):
432 This variable conditionally defines HAS_CLOSEDIR if closedir() is
436 This variable conditionally defines the HASCONST symbol, which
437 indicates to the C program that this C compiler knows about the
441 This variable conditionally defines the CRYPT symbol, which
442 indicates to the C program that the crypt() routine is available
443 to encrypt passwords and the like.
446 This variable conditionally defines the CSH symbol, which
447 indicates to the C program that the C-shell exists.
449 d_cuserid (d_cuserid.U):
450 This variable conditionally defines the HAS_CUSERID symbol, which
451 indicates to the C program that the cuserid() routine is available
452 to get character login names.
454 d_dbl_dig (d_dbl_dig.U):
455 This variable conditionally defines d_dbl_dig if this system's
456 header files provide DBL_DIG, which is the number of significant
457 digits in a double precision number.
459 d_difftime (d_difftime.U):
460 This variable conditionally defines the HAS_DIFFTIME symbol, which
461 indicates to the C program that the difftime() routine is available.
463 d_dirnamlen (i_dirent.U):
464 This variable conditionally defines DIRNAMLEN, which indicates
465 to the C program that the length of directory entry names is
466 provided by a d_namelen field.
468 d_dlerror (d_dlerror.U):
469 This variable conditionally defines the HAS_DLERROR symbol, which
470 indicates to the C program that the dlerror() routine is available.
472 d_dlopen (d_dlopen.U):
473 This variable conditionally defines the HAS_DLOPEN symbol, which
474 indicates to the C program that the dlopen() routine is available.
476 d_dlsymun (d_dlsymun.U):
477 This variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
478 indicates that we need to prepend an underscore to the symbol
479 name before calling dlsym().
481 d_dosuid (d_dosuid.U):
482 This variable conditionally defines the symbol DOSUID, which
483 tells the C program that it should insert setuid emulation code
484 on hosts which have setuid #! scripts disabled.
486 d_drand48proto (d_drand48proto.U):
487 This variable conditionally defines the HAS_DRAND48_PROTO symbol,
488 which indicates to the C program that the system provides
489 a prototype for the drand48() function. Otherwise, it is
490 up to the program to supply one.
493 This variable conditionally defines HAS_DUP2 if dup2() is
494 available to duplicate file descriptors.
496 d_eaccess (d_eaccess.U):
497 This variable conditionally defines the HAS_EACCESS symbol, which
498 indicates to the C program that the eaccess() routine is available.
500 d_endgrent (d_endgrent.U):
501 This variable conditionally defines the HAS_ENDGRENT symbol, which
502 indicates to the C program that the endgrent() routine is available
503 for sequential access of the group database.
505 d_endhent (d_endhent.U):
506 This variable conditionally defines HAS_ENDHOSTENT if endhostent() is
507 available to close whatever was being used for host queries.
509 d_endnent (d_endnent.U):
510 This variable conditionally defines HAS_ENDNETENT if endnetent() is
511 available to close whatever was being used for network queries.
513 d_endpent (d_endpent.U):
514 This variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
515 available to close whatever was being used for protocol queries.
517 d_endpwent (d_endpwent.U):
518 This variable conditionally defines the HAS_ENDPWENT symbol, which
519 indicates to the C program that the endpwent() routine is available
520 for sequential access of the passwd database.
522 d_endsent (d_endsent.U):
523 This variable conditionally defines HAS_ENDSERVENT if endservent() is
524 available to close whatever was being used for service queries.
526 d_eofnblk (nblock_io.U):
527 This variable conditionally defines EOF_NONBLOCK if EOF can be seen
528 when reading from a non-blocking I/O source.
531 This variable conditionally defines the symbols EUNICE and VAX, which
532 alerts the C program that it must deal with ideosyncracies of VMS.
534 d_fchmod (d_fchmod.U):
535 This variable conditionally defines the HAS_FCHMOD symbol, which
536 indicates to the C program that the fchmod() routine is available
537 to change mode of opened files.
539 d_fchown (d_fchown.U):
540 This variable conditionally defines the HAS_FCHOWN symbol, which
541 indicates to the C program that the fchown() routine is available
542 to change ownership of opened files.
545 This variable conditionally defines the HAS_FCNTL symbol, and indicates
546 whether the fcntl() function exists
548 d_fcntl_can_lock (d_fcntl_can_lock.U):
549 This variable conditionally defines the FCNTL_CAN_LOCK symbol
550 and indicates whether file locking with fcntl() works.
552 d_fd_macros (d_fd_set.U):
553 This variable contains the eventual value of the HAS_FD_MACROS symbol,
554 which indicates if your C compiler knows about the macros which
555 manipulate an fd_set.
557 d_fd_set (d_fd_set.U):
558 This variable contains the eventual value of the HAS_FD_SET symbol,
559 which indicates if your C compiler knows about the fd_set typedef.
561 d_fds_bits (d_fd_set.U):
562 This variable contains the eventual value of the HAS_FDS_BITS symbol,
563 which indicates if your fd_set typedef contains the fds_bits member.
564 If you have an fd_set typedef, but the dweebs who installed it did
565 a half-fast job and neglected to provide the macros to manipulate
566 an fd_set, HAS_FDS_BITS will let us know how to fix the gaffe.
568 d_fgetpos (d_fgetpos.U):
569 This variable conditionally defines HAS_FGETPOS if fgetpos() is
570 available to get the file position indicator.
572 d_flexfnam (d_flexfnam.U):
573 This variable conditionally defines the FLEXFILENAMES symbol, which
574 indicates that the system supports filenames longer than 14 characters.
577 This variable conditionally defines HAS_FLOCK if flock() is
578 available to do file locking.
581 This variable conditionally defines the HAS_FORK symbol, which
582 indicates to the C program that the fork() routine is available.
584 d_fpathconf (d_pathconf.U):
585 This variable conditionally defines the HAS_FPATHCONF symbol, which
586 indicates to the C program that the pathconf() routine is available
587 to determine file-system related limits and options associated
588 with a given open file descriptor.
590 d_fpos64_t (d_fpos64_t.U):
591 This symbol will be defined if the C compiler supports fpos64_t.
593 d_frexpl (d_frexpl.U):
594 This variable conditionally defines the HAS_FREXPL symbol, which
595 indicates to the C program that the frexpl() routine is available.
597 d_fs_data_s (d_fs_data_s.U):
598 This variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
599 which indicates that the struct fs_data is supported.
601 d_fseeko (d_fseeko.U):
602 This variable conditionally defines the HAS_FSEEKO symbol, which
603 indicates to the C program that the fseeko() routine is available.
605 d_fsetpos (d_fsetpos.U):
606 This variable conditionally defines HAS_FSETPOS if fsetpos() is
607 available to set the file position indicator.
609 d_fstatfs (d_fstatfs.U):
610 This variable conditionally defines the HAS_FSTATFS symbol, which
611 indicates to the C program that the fstatfs() routine is available.
613 d_fstatvfs (d_statvfs.U):
614 This variable conditionally defines the HAS_FSTATVFS symbol, which
615 indicates to the C program that the fstatvfs() routine is available.
617 d_ftello (d_ftello.U):
618 This variable conditionally defines the HAS_FTELLO symbol, which
619 indicates to the C program that the ftello() routine is available.
622 This variable conditionally defines the HAS_FTIME symbol, which indicates
623 that the ftime() routine exists. The ftime() routine is basically
624 a sub-second accuracy clock.
626 d_Gconvert (d_gconvert.U):
627 This variable holds what Gconvert is defined as to convert
628 floating point numbers into strings. It could be 'gconvert'
629 or a more complex macro emulating gconvert with gcvt() or sprintf.
631 d_Gconvert='gconvert((x),(n),(t),(b))'
632 d_Gconvert='gcvt((x),(n),(b))'
633 d_Gconvert='sprintf((b),"%.*g",(n),(x))'
635 d_getcwd (d_getcwd.U):
636 This variable conditionally defines the HAS_GETCWD symbol, which
637 indicates to the C program that the getcwd() routine is available
638 to get the current working directory.
640 d_getespwnam (d_getespwnam.U):
641 This variable conditionally defines HAS_GETESPWNAM if getespwnam() is
642 available to retrieve enchanced (shadow) password entries by name.
644 d_getfsstat (d_getfsstat.U):
645 This variable conditionally defines the HAS_GETFSSTAT symbol, which
646 indicates to the C program that the getfsstat() routine is available.
648 d_getgrent (d_getgrent.U):
649 This variable conditionally defines the HAS_GETGRENT symbol, which
650 indicates to the C program that the getgrent() routine is available
651 for sequential access of the group database.
653 d_getgrps (d_getgrps.U):
654 This variable conditionally defines the HAS_GETGROUPS symbol, which
655 indicates to the C program that the getgroups() routine is available
656 to get the list of process groups.
658 d_gethbyaddr (d_gethbyad.U):
659 This variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
660 indicates to the C program that the gethostbyaddr() routine is available
661 to look up hosts by their IP addresses.
663 d_gethbyname (d_gethbynm.U):
664 This variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
665 indicates to the C program that the gethostbyname() routine is available
666 to look up host names in some data base or other.
668 d_gethent (d_gethent.U):
669 This variable conditionally defines HAS_GETHOSTENT if gethostent() is
670 available to look up host names in some data base or another.
672 d_gethname (d_gethname.U):
673 This variable conditionally defines the HAS_GETHOSTNAME symbol, which
674 indicates to the C program that the gethostname() routine may be
675 used to derive the host name.
677 d_gethostprotos (d_gethostprotos.U):
678 This variable conditionally defines the HAS_GETHOST_PROTOS symbol,
679 which indicates to the C program that <netdb.h> supplies
680 prototypes for the various gethost*() functions.
681 See also netdbtype.U for probing for various netdb types.
683 d_getlogin (d_getlogin.U):
684 This variable conditionally defines the HAS_GETLOGIN symbol, which
685 indicates to the C program that the getlogin() routine is available
686 to get the login name.
688 d_getmnt (d_getmnt.U):
689 This variable conditionally defines the HAS_GETMNT symbol, which
690 indicates to the C program that the getmnt() routine is available
691 to retrieve one or more mount info blocks by filename.
693 d_getmntent (d_getmntent.U):
694 This variable conditionally defines the HAS_GETMNTENT symbol, which
695 indicates to the C program that the getmntent() routine is available
696 to iterate through mounted files to get their mount info.
698 d_getnbyaddr (d_getnbyad.U):
699 This variable conditionally defines the HAS_GETNETBYADDR symbol, which
700 indicates to the C program that the getnetbyaddr() routine is available
701 to look up networks by their IP addresses.
703 d_getnbyname (d_getnbynm.U):
704 This variable conditionally defines the HAS_GETNETBYNAME symbol, which
705 indicates to the C program that the getnetbyname() routine is available
706 to look up networks by their names.
708 d_getnent (d_getnent.U):
709 This variable conditionally defines HAS_GETNETENT if getnetent() is
710 available to look up network names in some data base or another.
712 d_getnetprotos (d_getnetprotos.U):
713 This variable conditionally defines the HAS_GETNET_PROTOS symbol,
714 which indicates to the C program that <netdb.h> supplies
715 prototypes for the various getnet*() functions.
716 See also netdbtype.U for probing for various netdb types.
718 d_getpagsz (d_getpagsz.U):
719 This variable conditionally defines HAS_GETPAGESIZE if getpagesize()
720 is available to get the system page size.
722 d_getpbyname (d_getprotby.U):
723 This variable conditionally defines the HAS_GETPROTOBYNAME
724 symbol, which indicates to the C program that the
725 getprotobyname() routine is available to look up protocols
728 d_getpbynumber (d_getprotby.U):
729 This variable conditionally defines the HAS_GETPROTOBYNUMBER
730 symbol, which indicates to the C program that the
731 getprotobynumber() routine is available to look up protocols
734 d_getpent (d_getpent.U):
735 This variable conditionally defines HAS_GETPROTOENT if getprotoent() is
736 available to look up protocols in some data base or another.
738 d_getpgid (d_getpgid.U):
739 This variable conditionally defines the HAS_GETPGID symbol, which
740 indicates to the C program that the getpgid(pid) function
741 is available to get the process group id.
743 d_getpgrp2 (d_getpgrp2.U):
744 This variable conditionally defines the HAS_GETPGRP2 symbol, which
745 indicates to the C program that the getpgrp2() (as in DG/UX) routine
746 is available to get the current process group.
748 d_getpgrp (d_getpgrp.U):
749 This variable conditionally defines HAS_GETPGRP if getpgrp() is
750 available to get the current process group.
752 d_getppid (d_getppid.U):
753 This variable conditionally defines the HAS_GETPPID symbol, which
754 indicates to the C program that the getppid() routine is available
755 to get the parent process ID.
757 d_getprior (d_getprior.U):
758 This variable conditionally defines HAS_GETPRIORITY if getpriority()
759 is available to get a process's priority.
761 d_getprotoprotos (d_getprotoprotos.U):
762 This variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
763 which indicates to the C program that <netdb.h> supplies
764 prototypes for the various getproto*() functions.
765 See also netdbtype.U for probing for various netdb types.
767 d_getprpwnam (d_getprpwnam.U):
768 This variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
769 available to retrieve protected (shadow) password entries by name.
771 d_getpwent (d_getpwent.U):
772 This variable conditionally defines the HAS_GETPWENT symbol, which
773 indicates to the C program that the getpwent() routine is available
774 for sequential access of the passwd database.
776 d_getsbyname (d_getsrvby.U):
777 This variable conditionally defines the HAS_GETSERVBYNAME
778 symbol, which indicates to the C program that the
779 getservbyname() routine is available to look up services
782 d_getsbyport (d_getsrvby.U):
783 This variable conditionally defines the HAS_GETSERVBYPORT
784 symbol, which indicates to the C program that the
785 getservbyport() routine is available to look up services
788 d_getsent (d_getsent.U):
789 This variable conditionally defines HAS_GETSERVENT if getservent() is
790 available to look up network services in some data base or another.
792 d_getservprotos (d_getservprotos.U):
793 This variable conditionally defines the HAS_GETSERV_PROTOS symbol,
794 which indicates to the C program that <netdb.h> supplies
795 prototypes for the various getserv*() functions.
796 See also netdbtype.U for probing for various netdb types.
798 d_getspnam (d_getspnam.U):
799 This variable conditionally defines HAS_GETSPNAM if getspnam() is
800 available to retrieve SysV shadow password entries by name.
802 d_gettimeod (d_ftime.U):
803 This variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
804 indicates that the gettimeofday() system call exists (to obtain a
805 sub-second accuracy clock). You should probably include <sys/resource.h>.
807 d_gnulibc (d_gnulibc.U):
808 Defined if we're dealing with the GNU C Library.
810 d_grpasswd (i_grp.U):
811 This variable conditionally defines GRPASSWD, which indicates
812 that struct group in <grp.h> contains gr_passwd.
814 d_hasmntopt (d_hasmntopt.U):
815 This variable conditionally defines the HAS_HASMNTOPT symbol, which
816 indicates to the C program that the hasmntopt() routine is available
817 to query the mount options of file systems.
820 This variable conditionally defines HAS_HTONL if htonl() and its
821 friends are available to do network order byte swapping.
824 This variable conditionally defines the HAS_ICONV symbol, which
825 indicates to the C program that the iconv() routine is available.
827 d_index (d_strchr.U):
828 This variable conditionally defines HAS_INDEX if index() and
829 rindex() are available for string searching.
831 d_inetaton (d_inetaton.U):
832 This variable conditionally defines the HAS_INET_ATON symbol, which
833 indicates to the C program that the inet_aton() function is available
834 to parse IP address "dotted-quad" strings.
836 d_int64_t (d_int64_t.U):
837 This symbol will be defined if the C compiler supports int64_t.
839 d_isascii (d_isascii.U):
840 This variable conditionally defines the HAS_ISASCII constant,
841 which indicates to the C program that isascii() is available.
844 This variable conditionally defines the HAS_ISNAN symbol, which
845 indicates to the C program that the isnan() routine is available.
847 d_isnanl (d_isnanl.U):
848 This variable conditionally defines the HAS_ISNANL symbol, which
849 indicates to the C program that the isnanl() routine is available.
851 d_killpg (d_killpg.U):
852 This variable conditionally defines the HAS_KILLPG symbol, which
853 indicates to the C program that the killpg() routine is available
854 to kill process groups.
856 d_lchown (d_lchown.U):
857 This variable conditionally defines the HAS_LCHOWN symbol, which
858 indicates to the C program that the lchown() routine is available
859 to operate on a symbolic link (instead of following the link).
861 d_ldbl_dig (d_ldbl_dig.U):
862 This variable conditionally defines d_ldbl_dig if this system's
863 header files provide LDBL_DIG, which is the number of significant
864 digits in a long double precision number.
867 This variable conditionally defines HAS_LINK if link() is
868 available to create hard links.
870 d_locconv (d_locconv.U):
871 This variable conditionally defines HAS_LOCALECONV if localeconv() is
872 available for numeric and monetary formatting conventions.
875 This variable conditionally defines HAS_LOCKF if lockf() is
876 available to do file locking.
878 d_longdbl (d_longdbl.U):
879 This variable conditionally defines HAS_LONG_DOUBLE if
880 the long double type is supported.
882 d_longlong (d_longlong.U):
883 This variable conditionally defines HAS_LONG_LONG if
884 the long long type is supported.
886 d_lseekproto (d_lseekproto.U):
887 This variable conditionally defines the HAS_LSEEK_PROTO symbol,
888 which indicates to the C program that the system provides
889 a prototype for the lseek() function. Otherwise, it is
890 up to the program to supply one.
893 This variable conditionally defines HAS_LSTAT if lstat() is
894 available to do file stats on symbolic links.
896 d_madvise (d_madvise.U):
897 This variable conditionally defines HAS_MADVISE if madvise() is
898 available to map a file into memory.
901 This variable conditionally defines the HAS_MBLEN symbol, which
902 indicates to the C program that the mblen() routine is available
903 to find the number of bytes in a multibye character.
905 d_mbstowcs (d_mbstowcs.U):
906 This variable conditionally defines the HAS_MBSTOWCS symbol, which
907 indicates to the C program that the mbstowcs() routine is available
908 to convert a multibyte string into a wide character string.
910 d_mbtowc (d_mbtowc.U):
911 This variable conditionally defines the HAS_MBTOWC symbol, which
912 indicates to the C program that the mbtowc() routine is available
913 to convert multibyte to a wide character.
915 d_memchr (d_memchr.U):
916 This variable conditionally defines the HAS_MEMCHR symbol, which
917 indicates to the C program that the memchr() routine is available
918 to locate characters within a C string.
920 d_memcmp (d_memcmp.U):
921 This variable conditionally defines the HAS_MEMCMP symbol, which
922 indicates to the C program that the memcmp() routine is available
923 to compare blocks of memory.
925 d_memcpy (d_memcpy.U):
926 This variable conditionally defines the HAS_MEMCPY symbol, which
927 indicates to the C program that the memcpy() routine is available
928 to copy blocks of memory.
930 d_memmove (d_memmove.U):
931 This variable conditionally defines the HAS_MEMMOVE symbol, which
932 indicates to the C program that the memmove() routine is available
933 to copy potentatially overlapping blocks of memory.
935 d_memset (d_memset.U):
936 This variable conditionally defines the HAS_MEMSET symbol, which
937 indicates to the C program that the memset() routine is available
938 to set blocks of memory.
941 This variable conditionally defines the HAS_MKDIR symbol, which
942 indicates to the C program that the mkdir() routine is available
943 to create directories..
945 d_mkdtemp (d_mkdtemp.U):
946 This variable conditionally defines the HAS_MKDTEMP symbol, which
947 indicates to the C program that the mkdtemp() routine is available
948 to exclusively create a uniquely named temporary directory.
950 d_mkfifo (d_mkfifo.U):
951 This variable conditionally defines the HAS_MKFIFO symbol, which
952 indicates to the C program that the mkfifo() routine is available.
954 d_mkstemp (d_mkstemp.U):
955 This variable conditionally defines the HAS_MKSTEMP symbol, which
956 indicates to the C program that the mkstemp() routine is available
957 to exclusively create and open a uniquely named temporary file.
959 d_mkstemps (d_mkstemps.U):
960 This variable conditionally defines the HAS_MKSTEMPS symbol, which
961 indicates to the C program that the mkstemps() routine is available
962 to exclusively create and open a uniquely named (with a suffix)
965 d_mktime (d_mktime.U):
966 This variable conditionally defines the HAS_MKTIME symbol, which
967 indicates to the C program that the mktime() routine is available.
970 This variable conditionally defines HAS_MMAP if mmap() is
971 available to map a file into memory.
974 This variable conditionally defines the HAS_MODFL symbol, which
975 indicates to the C program that the modfl() routine is available.
977 d_mprotect (d_mprotect.U):
978 This variable conditionally defines HAS_MPROTECT if mprotect() is
979 available to modify the access protection of a memory mapped file.
982 This variable conditionally defines the HAS_MSG symbol, which
983 indicates that the entire msg*(2) library is present.
985 d_msg_ctrunc (d_socket.U):
986 This variable conditionally defines the HAS_MSG_CTRUNC symbol,
987 which indicates that the MSG_CTRUNC is available. #ifdef is
988 not enough because it may be an enum, glibc has been known to do this.
990 d_msg_dontroute (d_socket.U):
991 This variable conditionally defines the HAS_MSG_DONTROUTE symbol,
992 which indicates that the MSG_DONTROUTE is available. #ifdef is
993 not enough because it may be an enum, glibc has been known to do this.
995 d_msg_oob (d_socket.U):
996 This variable conditionally defines the HAS_MSG_OOB symbol,
997 which indicates that the MSG_OOB is available. #ifdef is
998 not enough because it may be an enum, glibc has been known to do this.
1000 d_msg_peek (d_socket.U):
1001 This variable conditionally defines the HAS_MSG_PEEK symbol,
1002 which indicates that the MSG_PEEK is available. #ifdef is
1003 not enough because it may be an enum, glibc has been known to do this.
1005 d_msg_proxy (d_socket.U):
1006 This variable conditionally defines the HAS_MSG_PROXY symbol,
1007 which indicates that the MSG_PROXY is available. #ifdef is
1008 not enough because it may be an enum, glibc has been known to do this.
1010 d_msgctl (d_msgctl.U):
1011 This variable conditionally defines the HAS_MSGCTL symbol, which
1012 indicates to the C program that the msgctl() routine is available.
1014 d_msgget (d_msgget.U):
1015 This variable conditionally defines the HAS_MSGGET symbol, which
1016 indicates to the C program that the msgget() routine is available.
1018 d_msgrcv (d_msgrcv.U):
1019 This variable conditionally defines the HAS_MSGRCV symbol, which
1020 indicates to the C program that the msgrcv() routine is available.
1022 d_msgsnd (d_msgsnd.U):
1023 This variable conditionally defines the HAS_MSGSND symbol, which
1024 indicates to the C program that the msgsnd() routine is available.
1026 d_msync (d_msync.U):
1027 This variable conditionally defines HAS_MSYNC if msync() is
1028 available to synchronize a mapped file.
1030 d_munmap (d_munmap.U):
1031 This variable conditionally defines HAS_MUNMAP if munmap() is
1032 available to unmap a region mapped by mmap().
1034 d_mymalloc (mallocsrc.U):
1035 This variable conditionally defines MYMALLOC in case other parts
1036 of the source want to take special action if MYMALLOC is used.
1037 This may include different sorts of profiling or error detection.
1040 This variable conditionally defines the HAS_NICE symbol, which
1041 indicates to the C program that the nice() routine is available.
1043 d_nv_preserves_uv (perlxv.U):
1044 This variable indicates whether a variable of type nvtype
1045 can preserve all the bits a variable of type uvtype.
1047 d_nv_preserves_uv_bits (perlxv.U):
1048 This variable indicates how many of bits type uvtype
1049 a variable nvtype can preserve.
1051 d_off64_t (d_off64_t.U):
1052 This symbol will be defined if the C compiler supports off64_t.
1054 d_old_pthread_create_joinable (d_pthrattrj.U):
1055 This variable conditionally defines pthread_create_joinable.
1056 undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
1058 d_oldpthreads (usethreads.U):
1059 This variable conditionally defines the OLD_PTHREADS_API symbol,
1060 and indicates that Perl should be built to use the old
1061 draft POSIX threads API. This is only potentially meaningful if
1064 d_oldsock (d_socket.U):
1065 This variable conditionally defines the OLDSOCKET symbol, which
1066 indicates that the BSD socket interface is based on 4.1c and not 4.2.
1068 d_open3 (d_open3.U):
1069 This variable conditionally defines the HAS_OPEN3 manifest constant,
1070 which indicates to the C program that the 3 argument version of
1071 the open(2) function is available.
1073 d_pathconf (d_pathconf.U):
1074 This variable conditionally defines the HAS_PATHCONF symbol, which
1075 indicates to the C program that the pathconf() routine is available
1076 to determine file-system related limits and options associated
1077 with a given filename.
1079 d_pause (d_pause.U):
1080 This variable conditionally defines the HAS_PAUSE symbol, which
1081 indicates to the C program that the pause() routine is available
1082 to suspend a process until a signal is received.
1084 d_perl_otherlibdirs (otherlibdirs.U):
1085 This variable conditionally defines PERL_OTHERLIBDIRS, which
1086 contains a colon-separated set of paths for the perl binary to
1087 include in @INC. See also otherlibdirs.
1089 d_phostname (d_gethname.U):
1090 This variable conditionally defines the HAS_PHOSTNAME symbol, which
1091 contains the shell command which, when fed to popen(), may be
1092 used to derive the host name.
1095 This variable conditionally defines the HAS_PIPE symbol, which
1096 indicates to the C program that the pipe() routine is available
1097 to create an inter-process channel.
1100 This variable conditionally defines the HAS_POLL symbol, which
1101 indicates to the C program that the poll() routine is available
1102 to poll active file descriptors.
1104 d_portable (d_portable.U):
1105 This variable conditionally defines the PORTABLE symbol, which
1106 indicates to the C program that it should not assume that it is
1107 running on the machine it was compiled on.
1109 d_PRId64 (quadfio.U):
1110 This variable conditionally defines the PERL_PRId64 symbol, which
1111 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1113 d_PRIeldbl (longdblfio.U):
1114 This variable conditionally defines the PERL_PRIfldbl symbol, which
1115 indiciates that stdio has a symbol to print long doubles.
1117 d_PRIEUldbl (longdblfio.U):
1118 This variable conditionally defines the PERL_PRIfldbl symbol, which
1119 indiciates that stdio has a symbol to print long doubles.
1120 The 'U' in the name is to separate this from d_PRIeldbl so that even
1121 case-blind systems can see the difference.
1123 d_PRIfldbl (longdblfio.U):
1124 This variable conditionally defines the PERL_PRIfldbl symbol, which
1125 indiciates that stdio has a symbol to print long doubles.
1127 d_PRIFUldbl (longdblfio.U):
1128 This variable conditionally defines the PERL_PRIfldbl symbol, which
1129 indiciates that stdio has a symbol to print long doubles.
1130 The 'U' in the name is to separate this from d_PRIfldbl so that even
1131 case-blind systems can see the difference.
1133 d_PRIgldbl (longdblfio.U):
1134 This variable conditionally defines the PERL_PRIfldbl symbol, which
1135 indiciates that stdio has a symbol to print long doubles.
1137 d_PRIGUldbl (longdblfio.U):
1138 This variable conditionally defines the PERL_PRIfldbl symbol, which
1139 indiciates that stdio has a symbol to print long doubles.
1140 The 'U' in the name is to separate this from d_PRIgldbl so that even
1141 case-blind systems can see the difference.
1143 d_PRIi64 (quadfio.U):
1144 This variable conditionally defines the PERL_PRIi64 symbol, which
1145 indiciates that stdio has a symbol to print 64-bit decimal numbers.
1147 d_PRIo64 (quadfio.U):
1148 This variable conditionally defines the PERL_PRIo64 symbol, which
1149 indiciates that stdio has a symbol to print 64-bit octal numbers.
1151 d_PRIu64 (quadfio.U):
1152 This variable conditionally defines the PERL_PRIu64 symbol, which
1153 indiciates that stdio has a symbol to print 64-bit unsigned decimal
1156 d_PRIx64 (quadfio.U):
1157 This variable conditionally defines the PERL_PRIx64 symbol, which
1158 indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
1160 d_PRIXU64 (quadfio.U):
1161 This variable conditionally defines the PERL_PRIXU64 symbol, which
1162 indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
1163 The 'U' in the name is to separate this from d_PRIx64 so that even
1164 case-blind systems can see the difference.
1166 d_pthread_yield (d_pthread_y.U):
1167 This variable conditionally defines the HAS_PTHREAD_YIELD
1168 symbol if the pthread_yield routine is available to yield
1169 the execution of the current thread.
1172 This variable conditionally defines PWAGE, which indicates
1173 that struct passwd contains pw_age.
1175 d_pwchange (i_pwd.U):
1176 This variable conditionally defines PWCHANGE, which indicates
1177 that struct passwd contains pw_change.
1179 d_pwclass (i_pwd.U):
1180 This variable conditionally defines PWCLASS, which indicates
1181 that struct passwd contains pw_class.
1183 d_pwcomment (i_pwd.U):
1184 This variable conditionally defines PWCOMMENT, which indicates
1185 that struct passwd contains pw_comment.
1187 d_pwexpire (i_pwd.U):
1188 This variable conditionally defines PWEXPIRE, which indicates
1189 that struct passwd contains pw_expire.
1191 d_pwgecos (i_pwd.U):
1192 This variable conditionally defines PWGECOS, which indicates
1193 that struct passwd contains pw_gecos.
1195 d_pwpasswd (i_pwd.U):
1196 This variable conditionally defines PWPASSWD, which indicates
1197 that struct passwd contains pw_passwd.
1199 d_pwquota (i_pwd.U):
1200 This variable conditionally defines PWQUOTA, which indicates
1201 that struct passwd contains pw_quota.
1203 d_qgcvt (d_qgcvt.U):
1204 This variable conditionally defines the HAS_QGCVT symbol, which
1205 indicates to the C program that the qgcvt() routine is available.
1207 d_quad (quadtype.U):
1208 This variable, if defined, tells that there's a 64-bit integer type,
1211 d_readdir (d_readdir.U):
1212 This variable conditionally defines HAS_READDIR if readdir() is
1213 available to read directory entries.
1215 d_readlink (d_readlink.U):
1216 This variable conditionally defines the HAS_READLINK symbol, which
1217 indicates to the C program that the readlink() routine is available
1218 to read the value of a symbolic link.
1220 d_rename (d_rename.U):
1221 This variable conditionally defines the HAS_RENAME symbol, which
1222 indicates to the C program that the rename() routine is available
1225 d_rewinddir (d_readdir.U):
1226 This variable conditionally defines HAS_REWINDDIR if rewinddir() is
1229 d_rmdir (d_rmdir.U):
1230 This variable conditionally defines HAS_RMDIR if rmdir() is
1231 available to remove directories.
1233 d_safebcpy (d_safebcpy.U):
1234 This variable conditionally defines the HAS_SAFE_BCOPY symbol if
1235 the bcopy() routine can do overlapping copies.
1237 d_safemcpy (d_safemcpy.U):
1238 This variable conditionally defines the HAS_SAFE_MEMCPY symbol if
1239 the memcpy() routine can do overlapping copies.
1241 d_sanemcmp (d_sanemcmp.U):
1242 This variable conditionally defines the HAS_SANE_MEMCMP symbol if
1243 the memcpy() routine is available and can be used to compare relative
1244 magnitudes of chars with their high bits set.
1246 d_sched_yield (d_pthread_y.U):
1247 This variable conditionally defines the HAS_SCHED_YIELD
1248 symbol if the sched_yield routine is available to yield
1249 the execution of the current thread.
1251 d_scm_rights (d_socket.U):
1252 This variable conditionally defines the HAS_SCM_RIGHTS symbol,
1253 which indicates that the SCM_RIGHTS is available. #ifdef is
1254 not enough because it may be an enum, glibc has been known to do this.
1256 d_SCNfldbl (longdblfio.U):
1257 This variable conditionally defines the PERL_PRIfldbl symbol, which
1258 indiciates that stdio has a symbol to scan long doubles.
1260 d_seekdir (d_readdir.U):
1261 This variable conditionally defines HAS_SEEKDIR if seekdir() is
1264 d_select (d_select.U):
1265 This variable conditionally defines HAS_SELECT if select() is
1266 available to select active file descriptors. A <sys/time.h>
1267 inclusion may be necessary for the timeout field.
1270 This variable conditionally defines the HAS_SEM symbol, which
1271 indicates that the entire sem*(2) library is present.
1273 d_semctl (d_semctl.U):
1274 This variable conditionally defines the HAS_SEMCTL symbol, which
1275 indicates to the C program that the semctl() routine is available.
1277 d_semctl_semid_ds (d_union_semun.U):
1278 This variable conditionally defines USE_SEMCTL_SEMID_DS, which
1279 indicates that struct semid_ds * is to be used for semctl IPC_STAT.
1281 d_semctl_semun (d_union_semun.U):
1282 This variable conditionally defines USE_SEMCTL_SEMUN, which
1283 indicates that union semun is to be used for semctl IPC_STAT.
1285 d_semget (d_semget.U):
1286 This variable conditionally defines the HAS_SEMGET symbol, which
1287 indicates to the C program that the semget() routine is available.
1289 d_semop (d_semop.U):
1290 This variable conditionally defines the HAS_SEMOP symbol, which
1291 indicates to the C program that the semop() routine is available.
1293 d_setegid (d_setegid.U):
1294 This variable conditionally defines the HAS_SETEGID symbol, which
1295 indicates to the C program that the setegid() routine is available
1296 to change the effective gid of the current program.
1298 d_seteuid (d_seteuid.U):
1299 This variable conditionally defines the HAS_SETEUID symbol, which
1300 indicates to the C program that the seteuid() routine is available
1301 to change the effective uid of the current program.
1303 d_setgrent (d_setgrent.U):
1304 This variable conditionally defines the HAS_SETGRENT symbol, which
1305 indicates to the C program that the setgrent() routine is available
1306 for initializing sequential access to the group database.
1308 d_setgrps (d_setgrps.U):
1309 This variable conditionally defines the HAS_SETGROUPS symbol, which
1310 indicates to the C program that the setgroups() routine is available
1311 to set the list of process groups.
1313 d_sethent (d_sethent.U):
1314 This variable conditionally defines HAS_SETHOSTENT if sethostent() is
1317 d_setlinebuf (d_setlnbuf.U):
1318 This variable conditionally defines the HAS_SETLINEBUF symbol, which
1319 indicates to the C program that the setlinebuf() routine is available
1320 to change stderr or stdout from block-buffered or unbuffered to a
1323 d_setlocale (d_setlocale.U):
1324 This variable conditionally defines HAS_SETLOCALE if setlocale() is
1325 available to handle locale-specific ctype implementations.
1327 d_setnent (d_setnent.U):
1328 This variable conditionally defines HAS_SETNETENT if setnetent() is
1331 d_setpent (d_setpent.U):
1332 This variable conditionally defines HAS_SETPROTOENT if setprotoent() is
1335 d_setpgid (d_setpgid.U):
1336 This variable conditionally defines the HAS_SETPGID symbol if the
1337 setpgid(pid, gpid) function is available to set process group ID.
1339 d_setpgrp2 (d_setpgrp2.U):
1340 This variable conditionally defines the HAS_SETPGRP2 symbol, which
1341 indicates to the C program that the setpgrp2() (as in DG/UX) routine
1342 is available to set the current process group.
1344 d_setpgrp (d_setpgrp.U):
1345 This variable conditionally defines HAS_SETPGRP if setpgrp() is
1346 available to set the current process group.
1348 d_setprior (d_setprior.U):
1349 This variable conditionally defines HAS_SETPRIORITY if setpriority()
1350 is available to set a process's priority.
1352 d_setproctitle (d_setproctitle.U):
1353 This variable conditionally defines the HAS_SETPROCTITLE symbol,
1354 which indicates to the C program that the setproctitle() routine
1357 d_setpwent (d_setpwent.U):
1358 This variable conditionally defines the HAS_SETPWENT symbol, which
1359 indicates to the C program that the setpwent() routine is available
1360 for initializing sequential access to the passwd database.
1362 d_setregid (d_setregid.U):
1363 This variable conditionally defines HAS_SETREGID if setregid() is
1364 available to change the real and effective gid of the current
1367 d_setresgid (d_setregid.U):
1368 This variable conditionally defines HAS_SETRESGID if setresgid() is
1369 available to change the real, effective and saved gid of the current
1372 d_setresuid (d_setreuid.U):
1373 This variable conditionally defines HAS_SETREUID if setresuid() is
1374 available to change the real, effective and saved uid of the current
1377 d_setreuid (d_setreuid.U):
1378 This variable conditionally defines HAS_SETREUID if setreuid() is
1379 available to change the real and effective uid of the current
1382 d_setrgid (d_setrgid.U):
1383 This variable conditionally defines the HAS_SETRGID symbol, which
1384 indicates to the C program that the setrgid() routine is available
1385 to change the real gid of the current program.
1387 d_setruid (d_setruid.U):
1388 This variable conditionally defines the HAS_SETRUID symbol, which
1389 indicates to the C program that the setruid() routine is available
1390 to change the real uid of the current program.
1392 d_setsent (d_setsent.U):
1393 This variable conditionally defines HAS_SETSERVENT if setservent() is
1396 d_setsid (d_setsid.U):
1397 This variable conditionally defines HAS_SETSID if setsid() is
1398 available to set the process group ID.
1400 d_setvbuf (d_setvbuf.U):
1401 This variable conditionally defines the HAS_SETVBUF symbol, which
1402 indicates to the C program that the setvbuf() routine is available
1403 to change buffering on an open stdio stream.
1406 This variable conditionally defines the USE_SFIO symbol,
1407 and indicates whether sfio is available (and should be used).
1410 This variable conditionally defines the HAS_SHM symbol, which
1411 indicates that the entire shm*(2) library is present.
1413 d_shmat (d_shmat.U):
1414 This variable conditionally defines the HAS_SHMAT symbol, which
1415 indicates to the C program that the shmat() routine is available.
1417 d_shmatprototype (d_shmat.U):
1418 This variable conditionally defines the HAS_SHMAT_PROTOTYPE
1419 symbol, which indicates that sys/shm.h has a prototype for
1422 d_shmctl (d_shmctl.U):
1423 This variable conditionally defines the HAS_SHMCTL symbol, which
1424 indicates to the C program that the shmctl() routine is available.
1426 d_shmdt (d_shmdt.U):
1427 This variable conditionally defines the HAS_SHMDT symbol, which
1428 indicates to the C program that the shmdt() routine is available.
1430 d_shmget (d_shmget.U):
1431 This variable conditionally defines the HAS_SHMGET symbol, which
1432 indicates to the C program that the shmget() routine is available.
1434 d_sigaction (d_sigaction.U):
1435 This variable conditionally defines the HAS_SIGACTION symbol, which
1436 indicates that the Vr4 sigaction() routine is available.
1438 d_sigsetjmp (d_sigsetjmp.U):
1439 This variable conditionally defines the HAS_SIGSETJMP symbol,
1440 which indicates that the sigsetjmp() routine is available to
1441 call setjmp() and optionally save the process's signal mask.
1443 d_socket (d_socket.U):
1444 This variable conditionally defines HAS_SOCKET, which indicates
1445 that the BSD socket interface is supported.
1447 d_socklen_t (d_socklen_t.U):
1448 This symbol will be defined if the C compiler supports socklen_t.
1450 d_sockpair (d_socket.U):
1451 This variable conditionally defines the HAS_SOCKETPAIR symbol, which
1452 indicates that the BSD socketpair() is supported.
1454 d_socks5_init (d_socks5_init.U):
1455 This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
1456 indicates to the C program that the socks5_init() routine is available.
1458 d_sqrtl (d_sqrtl.U):
1459 This variable conditionally defines the HAS_SQRTL symbol, which
1460 indicates to the C program that the sqrtl() routine is available.
1462 d_statblks (d_statblks.U):
1463 This variable conditionally defines USE_STAT_BLOCKS
1464 if this system has a stat structure declaring
1465 st_blksize and st_blocks.
1467 d_statfs_f_flags (d_statfs_f_flags.U):
1468 This variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
1469 symbol, which indicates to struct statfs from has f_flags member.
1470 This kind of struct statfs is coming from sys/mount.h (BSD),
1471 not from sys/statfs.h (SYSV).
1473 d_statfs_s (d_statfs_s.U):
1474 This variable conditionally defines the HAS_STRUCT_STATFS symbol,
1475 which indicates that the struct statfs is supported.
1477 d_statvfs (d_statvfs.U):
1478 This variable conditionally defines the HAS_STATVFS symbol, which
1479 indicates to the C program that the statvfs() routine is available.
1481 d_stdio_cnt_lval (d_stdstdio.U):
1482 This variable conditionally defines STDIO_CNT_LVALUE if the
1483 FILE_cnt macro can be used as an lvalue.
1485 d_stdio_ptr_lval (d_stdstdio.U):
1486 This variable conditionally defines STDIO_PTR_LVALUE if the
1487 FILE_ptr macro can be used as an lvalue.
1489 d_stdio_ptr_lval_nochange_cnt (d_stdstdio.U):
1490 This symbol is defined if using the FILE_ptr macro as an lvalue
1491 to increase the pointer by n leaves File_cnt(fp) unchanged.
1493 d_stdio_ptr_lval_sets_cnt (d_stdstdio.U):
1494 This symbol is defined if using the FILE_ptr macro as an lvalue
1495 to increase the pointer by n has the side effect of decreasing the
1496 value of File_cnt(fp) by n.
1498 d_stdio_stream_array (stdio_streams.U):
1499 This variable tells whether there is an array holding
1502 d_stdiobase (d_stdstdio.U):
1503 This variable conditionally defines USE_STDIO_BASE if this system
1504 has a FILE structure declaring a usable _base field (or equivalent)
1507 d_stdstdio (d_stdstdio.U):
1508 This variable conditionally defines USE_STDIO_PTR if this system
1509 has a FILE structure declaring usable _ptr and _cnt fields (or
1510 equivalent) in stdio.h.
1512 d_strchr (d_strchr.U):
1513 This variable conditionally defines HAS_STRCHR if strchr() and
1514 strrchr() are available for string searching.
1516 d_strcoll (d_strcoll.U):
1517 This variable conditionally defines HAS_STRCOLL if strcoll() is
1518 available to compare strings using collating information.
1520 d_strctcpy (d_strctcpy.U):
1521 This variable conditionally defines the USE_STRUCT_COPY symbol, which
1522 indicates to the C program that this C compiler knows how to copy
1525 d_strerrm (d_strerror.U):
1526 This variable holds what Strerrr is defined as to translate an error
1527 code condition into an error message string. It could be 'strerror'
1528 or a more complex macro emulating strrror with sys_errlist[], or the
1529 "unknown" string when both strerror and sys_errlist are missing.
1531 d_strerror (d_strerror.U):
1532 This variable conditionally defines HAS_STRERROR if strerror() is
1533 available to translate error numbers to strings.
1535 d_strtod (d_strtod.U):
1536 This variable conditionally defines the HAS_STRTOD symbol, which
1537 indicates to the C program that the strtod() routine is available
1538 to provide better numeric string conversion than atof().
1540 d_strtol (d_strtol.U):
1541 This variable conditionally defines the HAS_STRTOL symbol, which
1542 indicates to the C program that the strtol() routine is available
1543 to provide better numeric string conversion than atoi() and friends.
1545 d_strtold (d_strtold.U):
1546 This variable conditionally defines the HAS_STRTOLD symbol, which
1547 indicates to the C program that the strtold() routine is available.
1549 d_strtoll (d_strtoll.U):
1550 This variable conditionally defines the HAS_STRTOLL symbol, which
1551 indicates to the C program that the strtoll() routine is available.
1553 d_strtoul (d_strtoul.U):
1554 This variable conditionally defines the HAS_STRTOUL symbol, which
1555 indicates to the C program that the strtoul() routine is available
1556 to provide conversion of strings to unsigned long.
1558 d_strtoull (d_strtoull.U):
1559 This variable conditionally defines the HAS_STRTOULL symbol, which
1560 indicates to the C program that the strtoull() routine is available.
1562 d_strtouq (d_strtouq.U):
1563 This variable conditionally defines the HAS_STRTOUQ symbol, which
1564 indicates to the C program that the strtouq() routine is available.
1566 d_strxfrm (d_strxfrm.U):
1567 This variable conditionally defines HAS_STRXFRM if strxfrm() is
1568 available to transform strings.
1570 d_suidsafe (d_dosuid.U):
1571 This variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
1572 if setuid scripts can be secure. This test looks in /dev/fd/.
1574 d_symlink (d_symlink.U):
1575 This variable conditionally defines the HAS_SYMLINK symbol, which
1576 indicates to the C program that the symlink() routine is available
1577 to create symbolic links.
1579 d_syscall (d_syscall.U):
1580 This variable conditionally defines HAS_SYSCALL if syscall() is
1581 available call arbitrary system calls.
1583 d_sysconf (d_sysconf.U):
1584 This variable conditionally defines the HAS_SYSCONF symbol, which
1585 indicates to the C program that the sysconf() routine is available
1586 to determine system related limits and options.
1588 d_sysernlst (d_strerror.U):
1589 This variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
1590 is available to translate error numbers to the symbolic name.
1592 d_syserrlst (d_strerror.U):
1593 This variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
1594 available to translate error numbers to strings.
1596 d_system (d_system.U):
1597 This variable conditionally defines HAS_SYSTEM if system() is
1598 available to issue a shell command.
1600 d_tcgetpgrp (d_tcgtpgrp.U):
1601 This variable conditionally defines the HAS_TCGETPGRP symbol, which
1602 indicates to the C program that the tcgetpgrp() routine is available.
1603 to get foreground process group ID.
1605 d_tcsetpgrp (d_tcstpgrp.U):
1606 This variable conditionally defines the HAS_TCSETPGRP symbol, which
1607 indicates to the C program that the tcsetpgrp() routine is available
1608 to set foreground process group ID.
1610 d_telldir (d_readdir.U):
1611 This variable conditionally defines HAS_TELLDIR if telldir() is
1614 d_telldirproto (d_telldirproto.U):
1615 This variable conditionally defines the HAS_TELLDIR_PROTO symbol,
1616 which indicates to the C program that the system provides
1617 a prototype for the telldir() function. Otherwise, it is
1618 up to the program to supply one.
1621 This variable conditionally defines the HAS_TIME symbol, which indicates
1622 that the time() routine exists. The time() routine is normaly
1623 provided on UNIX systems.
1625 d_times (d_times.U):
1626 This variable conditionally defines the HAS_TIMES symbol, which indicates
1627 that the times() routine exists. The times() routine is normaly
1628 provided on UNIX systems. You may have to include <sys/times.h>.
1630 d_truncate (d_truncate.U):
1631 This variable conditionally defines HAS_TRUNCATE if truncate() is
1632 available to truncate files.
1634 d_tzname (d_tzname.U):
1635 This variable conditionally defines HAS_TZNAME if tzname[] is
1636 available to access timezone names.
1638 d_umask (d_umask.U):
1639 This variable conditionally defines the HAS_UMASK symbol, which
1640 indicates to the C program that the umask() routine is available.
1641 to set and get the value of the file creation mask.
1643 d_uname (d_gethname.U):
1644 This variable conditionally defines the HAS_UNAME symbol, which
1645 indicates to the C program that the uname() routine may be
1646 used to derive the host name.
1648 d_union_semun (d_union_semun.U):
1649 This variable conditionally defines HAS_UNION_SEMUN if the
1650 union semun is defined by including <sys/sem.h>.
1652 d_ustat (d_ustat.U):
1653 This variable conditionally defines HAS_USTAT if ustat() is
1654 available to query file system statistics by dev_t.
1656 d_vendorarch (vendorarch.U):
1657 This variable conditionally defined PERL_VENDORARCH.
1659 d_vendorbin (vendorbin.U):
1660 This variable conditionally defines PERL_VENDORBIN.
1662 d_vendorlib (vendorlib.U):
1663 This variable conditionally defines PERL_VENDORLIB.
1665 d_vfork (d_vfork.U):
1666 This variable conditionally defines the HAS_VFORK symbol, which
1667 indicates the vfork() routine is available.
1669 d_void_closedir (d_closedir.U):
1670 This variable conditionally defines VOID_CLOSEDIR if closedir()
1671 does not return a value.
1673 d_voidsig (d_voidsig.U):
1674 This variable conditionally defines VOIDSIG if this system
1675 declares "void (*signal(...))()" in signal.h. The old way was to
1676 declare it as "int (*signal(...))()".
1678 d_voidtty (i_sysioctl.U):
1679 This variable conditionally defines USE_IOCNOTTY to indicate that the
1680 ioctl() call with TIOCNOTTY should be used to void tty association.
1681 Otherwise (on USG probably), it is enough to close the standard file
1682 decriptors and do a setpgrp().
1684 d_volatile (d_volatile.U):
1685 This variable conditionally defines the HASVOLATILE symbol, which
1686 indicates to the C program that this C compiler knows about the
1687 volatile declaration.
1689 d_vprintf (d_vprintf.U):
1690 This variable conditionally defines the HAS_VPRINTF symbol, which
1691 indicates to the C program that the vprintf() routine is available
1692 to printf with a pointer to an argument list.
1694 d_wait4 (d_wait4.U):
1695 This variable conditionally defines the HAS_WAIT4 symbol, which
1696 indicates the wait4() routine is available.
1698 d_waitpid (d_waitpid.U):
1699 This variable conditionally defines HAS_WAITPID if waitpid() is
1700 available to wait for child process.
1702 d_wcstombs (d_wcstombs.U):
1703 This variable conditionally defines the HAS_WCSTOMBS symbol, which
1704 indicates to the C program that the wcstombs() routine is available
1705 to convert wide character strings to multibyte strings.
1707 d_wctomb (d_wctomb.U):
1708 This variable conditionally defines the HAS_WCTOMB symbol, which
1709 indicates to the C program that the wctomb() routine is available
1710 to convert a wide character to a multibyte.
1713 This variable conditionally defines the symbol XENIX, which alerts
1714 the C program that it runs under Xenix.
1717 This variable is used internally by Configure to determine the
1718 full pathname (if any) of the date program. After Configure runs,
1719 the value is reset to a plain "date" and is not useful.
1721 db_hashtype (i_db.U):
1722 This variable contains the type of the hash structure element
1723 in the <db.h> header file. In older versions of DB, it was
1724 int, while in newer ones it is u_int32_t.
1726 db_prefixtype (i_db.U):
1727 This variable contains the type of the prefix structure element
1728 in the <db.h> header file. In older versions of DB, it was
1729 int, while in newer ones it is size_t.
1731 defvoidused (voidflags.U):
1732 This variable contains the default value of the VOIDUSED symbol (15).
1734 direntrytype (i_dirent.U):
1735 This symbol is set to 'struct direct' or 'struct dirent' depending on
1736 whether dirent is available or not. You should use this pseudo type to
1737 portably declare your directory entries.
1740 This variable contains the extension that is to be used for the
1741 dynamically loaded modules that perl generaties.
1744 This variable contains the name of the dynamic loading file that
1745 will be used with the package.
1747 doublesize (doublesize.U):
1748 This variable contains the value of the DOUBLESIZE symbol, which
1749 indicates to the C program how many bytes there are in a double.
1751 drand01 (randfunc.U):
1752 Indicates the macro to be used to generate normalized
1753 random numbers. Uses randfunc, often divided by
1754 (double) (((unsigned long) 1 << randbits)) in order to
1755 normalize the result.
1756 In C programs, the macro 'Drand01' is mapped to drand01.
1758 dynamic_ext (Extensions.U):
1759 This variable holds a list of XS extension files we want to
1760 link dynamically into the package. It is used by Makefile.
1762 eagain (nblock_io.U):
1763 This variable bears the symbolic errno code set by read() when no
1764 data is present on the file and non-blocking I/O was enabled (otherwise,
1765 read() blocks naturally).
1768 This variable conditionally defines EBCDIC if this
1769 system uses EBCDIC encoding. Among other things, this
1770 means that the character ranges are not contiguous.
1774 This variable is used internally by Configure to determine the
1775 full pathname (if any) of the echo program. After Configure runs,
1776 the value is reset to a plain "echo" and is not useful.
1779 This variable is used internally by Configure to determine the
1780 full pathname (if any) of the egrep program. After Configure runs,
1781 the value is reset to a plain "egrep" and is not useful.
1784 This variable is defined but not used by Configure.
1785 The value is a plain '' and is not useful.
1788 When running under Eunice this variable contains a command which will
1789 convert a shell script to the proper form of text file for it to be
1790 executable by the shell. On other systems it is a no-op.
1793 This is an old synonym for _exe.
1796 This variable is used internally by Configure to determine the
1797 full pathname (if any) of the expr program. After Configure runs,
1798 the value is reset to a plain "expr" and is not useful.
1800 extensions (Extensions.U):
1801 This variable holds a list of all extension files (both XS and
1802 non-xs linked into the package. It is propagated to Config.pm
1803 and is typically used to test whether a particular extesion
1806 fflushall (fflushall.U):
1807 This symbol, if defined, tells that to flush
1808 all pending stdio output one must loop through all
1809 the stdio file handles stored in an array and fflush them.
1810 Note that if fflushNULL is defined, fflushall will not
1811 even be probed for and will be left undefined.
1813 fflushNULL (fflushall.U):
1814 This symbol, if defined, tells that fflush(NULL) does flush
1815 all pending stdio output.
1818 This variable is defined but not used by Configure.
1819 The value is a plain '' and is not useful.
1821 firstmakefile (Unix.U):
1822 This variable defines the first file searched by make. On unix,
1823 it is makefile (then Makefile). On case-insensitive systems,
1824 it might be something else. This is only used to deal with
1825 convoluted make depend tricks.
1828 This variable is defined but not used by Configure.
1829 The value is a plain '' and is not useful.
1831 fpossize (fpossize.U):
1832 This variable contains the size of a fpostype in bytes.
1834 fpostype (fpostype.U):
1835 This variable defines Fpos_t to be something like fpos_t, long,
1836 uint, or whatever type is used to declare file positions in libc.
1838 freetype (mallocsrc.U):
1839 This variable contains the return type of free(). It is usually
1840 void, but occasionally int.
1843 This variable contains the full pathname to 'ar', whether or
1844 not the user has specified 'portability'. This is only used
1848 This variable contains the full pathname to 'csh', whether or
1849 not the user has specified 'portability'. This is only used
1850 in the compiled C program, and we assume that all systems which
1851 can share this executable will have the same full pathname to
1854 full_sed (Loc_sed.U):
1855 This variable contains the full pathname to 'sed', whether or
1856 not the user has specified 'portability'. This is only used
1857 in the compiled C program, and we assume that all systems which
1858 can share this executable will have the same full pathname to
1861 gccosandvers (gccvers.U):
1862 If GNU cc (gcc) is used, this variable the operating system and
1863 version used to compile the gcc. It is set to '' if not gcc,
1864 or if nothing useful can be parsed as the os version.
1866 gccversion (gccvers.U):
1867 If GNU cc (gcc) is used, this variable holds '1' or '2' to
1868 indicate whether the compiler is version 1 or 2. This is used in
1869 setting some of the default cflags. It is set to '' if not gcc.
1872 This variable contains the format string used for printing a Gid_t.
1874 gidsign (gidsign.U):
1875 This variable contains the signedness of a gidtype.
1876 1 for unsigned, -1 for signed.
1878 gidsize (gidsize.U):
1879 This variable contains the size of a gidtype in bytes.
1881 gidtype (gidtype.U):
1882 This variable defines Gid_t to be something like gid_t, int,
1883 ushort, or whatever type is used to declare the return type
1884 of getgid(). Typically, it is the type of group ids in the kernel.
1887 This variable holds the general path (space-separated) used to
1888 find libraries. It may contain directories that do not exist on
1889 this platform, libpth is the cleaned-up version.
1892 This variable is used internally by Configure to determine the
1893 full pathname (if any) of the grep program. After Configure runs,
1894 the value is reset to a plain "grep" and is not useful.
1897 This variable contains a command that produces the text of the
1898 /etc/group file. This is normally "cat /etc/group", but can be
1899 "ypcat group" when NIS is used.
1900 On some systems, such as os390, there may be no equivalent
1901 command, in which case this variable is unset.
1903 groupstype (groupstype.U):
1904 This variable defines Groups_t to be something like gid_t, int,
1905 ushort, or whatever type is used for the second argument to
1906 getgroups() and setgroups(). Usually, this is the same as
1907 gidtype (gid_t), but sometimes it isn't.
1910 This variable is used internally by Configure to determine the
1911 full pathname (if any) of the gzip program. After Configure runs,
1912 the value is reset to a plain "gzip" and is not useful.
1914 h_fcntl (h_fcntl.U):
1915 This is variable gets set in various places to tell i_fcntl that
1916 <fcntl.h> should be included.
1918 h_sysfile (h_sysfile.U):
1919 This is variable gets set in various places to tell i_sys_file that
1920 <sys/file.h> should be included.
1923 Gives the type of hints used for previous answers. May be one of
1924 "default", "recommended" or "previous".
1927 This variable contains a command that produces the text of the
1928 /etc/hosts file. This is normally "cat /etc/hosts", but can be
1929 "ypcat hosts" when NIS is used.
1930 On some systems, such as os390, there may be no equivalent
1931 command, in which case this variable is unset.
1934 This variable is the size of an I16 in bytes.
1937 This variable contains the C type used for Perl's I16.
1940 This variable is the size of an I32 in bytes.
1943 This variable contains the C type used for Perl's I32.
1946 This variable is the size of an I64 in bytes.
1949 This variable contains the C type used for Perl's I64.
1952 This variable is the size of an I8 in bytes.
1955 This variable contains the C type used for Perl's I8.
1957 i_arpainet (i_arpainet.U):
1958 This variable conditionally defines the I_ARPA_INET symbol,
1959 and indicates whether a C program should include <arpa/inet.h>.
1961 i_bsdioctl (i_sysioctl.U):
1962 This variable conditionally defines the I_SYS_BSDIOCTL symbol, which
1963 indicates to the C program that <sys/bsdioctl.h> exists and should
1967 This variable conditionally defines the I_DB symbol, and indicates
1968 whether a C program may include Berkeley's DB include file <db.h>.
1971 This variable conditionally defines the I_DBM symbol, which
1972 indicates to the C program that <dbm.h> exists and should
1975 i_dirent (i_dirent.U):
1976 This variable conditionally defines I_DIRENT, which indicates
1977 to the C program that it should include <dirent.h>.
1980 This variable conditionally defines the I_DLD symbol, which
1981 indicates to the C program that <dld.h> (GNU dynamic loading)
1982 exists and should be included.
1984 i_dlfcn (i_dlfcn.U):
1985 This variable conditionally defines the I_DLFCN symbol, which
1986 indicates to the C program that <dlfcn.h> exists and should
1989 i_fcntl (i_fcntl.U):
1990 This variable controls the value of I_FCNTL (which tells
1991 the C program to include <fcntl.h>).
1993 i_float (i_float.U):
1994 This variable conditionally defines the I_FLOAT symbol, and indicates
1995 whether a C program may include <float.h> to get symbols like DBL_MAX
1996 or DBL_MIN, i.e. machine dependent floating point values.
1999 This variable conditionally defines the I_GDBM symbol, which
2000 indicates to the C program that <gdbm.h> exists and should
2004 This variable conditionally defines the I_GRP symbol, and indicates
2005 whether a C program should include <grp.h>.
2007 i_iconv (i_iconv.U):
2008 This variable conditionally defines the I_ICONV symbol, and indicates
2009 whether a C program should include <iconv.h>.
2011 i_ieeefp (i_ieeefp.U):
2012 This variable conditionally defines the I_IEEEFP symbol, and indicates
2013 whether a C program should include <ieeefp.h>.
2015 i_inttypes (i_inttypes.U):
2016 This variable conditionally defines the I_INTTYPES symbol,
2017 and indicates whether a C program should include <inttypes.h>.
2019 i_libutil (i_libutil.U):
2020 This variable conditionally defines the I_LIBUTIL symbol, and indicates
2021 whether a C program should include <libutil.h>.
2023 i_limits (i_limits.U):
2024 This variable conditionally defines the I_LIMITS symbol, and indicates
2025 whether a C program may include <limits.h> to get symbols like WORD_BIT
2028 i_locale (i_locale.U):
2029 This variable conditionally defines the I_LOCALE symbol,
2030 and indicates whether a C program should include <locale.h>.
2032 i_machcthr (i_machcthr.U):
2033 This variable conditionally defines the I_MACH_CTHREADS symbol,
2034 and indicates whether a C program should include <mach/cthreads.h>.
2036 i_malloc (i_malloc.U):
2037 This variable conditionally defines the I_MALLOC symbol, and indicates
2038 whether a C program should include <malloc.h>.
2041 This variable conditionally defines the I_MATH symbol, and indicates
2042 whether a C program may include <math.h>.
2044 i_memory (i_memory.U):
2045 This variable conditionally defines the I_MEMORY symbol, and indicates
2046 whether a C program should include <memory.h>.
2048 i_mntent (i_mntent.U):
2049 This variable conditionally defines the I_MNTENT symbol, and indicates
2050 whether a C program should include <mntent.h>.
2053 This variable conditionally defines the I_NDBM symbol, which
2054 indicates to the C program that <ndbm.h> exists and should
2057 i_netdb (i_netdb.U):
2058 This variable conditionally defines the I_NETDB symbol, and indicates
2059 whether a C program should include <netdb.h>.
2061 i_neterrno (i_neterrno.U):
2062 This variable conditionally defines the I_NET_ERRNO symbol, which
2063 indicates to the C program that <net/errno.h> exists and should
2066 i_netinettcp (i_netinettcp.U):
2067 This variable conditionally defines the I_NETINET_TCP symbol,
2068 and indicates whether a C program should include <netinet/tcp.h>.
2071 This variable conditionally defines I_NETINET_IN, which indicates
2072 to the C program that it should include <netinet/in.h>. Otherwise,
2073 you may try <sys/in.h>.
2076 This variable conditionally defines the I_POLL symbol, and indicates
2077 whether a C program should include <poll.h>.
2080 This variable conditionally defines the I_PROT symbol, and indicates
2081 whether a C program should include <prot.h>.
2083 i_pthread (i_pthread.U):
2084 This variable conditionally defines the I_PTHREAD symbol,
2085 and indicates whether a C program should include <pthread.h>.
2088 This variable conditionally defines I_PWD, which indicates
2089 to the C program that it should include <pwd.h>.
2091 i_rpcsvcdbm (i_dbm.U):
2092 This variable conditionally defines the I_RPCSVC_DBM symbol, which
2093 indicates to the C program that <rpcsvc/dbm.h> exists and should
2094 be included. Some System V systems might need this instead of <dbm.h>.
2097 This variable conditionally defines the I_SFIO symbol,
2098 and indicates whether a C program should include <sfio.h>.
2100 i_sgtty (i_termio.U):
2101 This variable conditionally defines the I_SGTTY symbol, which
2102 indicates to the C program that it should include <sgtty.h> rather
2105 i_shadow (i_shadow.U):
2106 This variable conditionally defines the I_SHADOW symbol, and indicates
2107 whether a C program should include <shadow.h>.
2109 i_socks (i_socks.U):
2110 This variable conditionally defines the I_SOCKS symbol, and indicates
2111 whether a C program should include <socks.h>.
2113 i_stdarg (i_varhdr.U):
2114 This variable conditionally defines the I_STDARG symbol, which
2115 indicates to the C program that <stdarg.h> exists and should
2118 i_stddef (i_stddef.U):
2119 This variable conditionally defines the I_STDDEF symbol, which
2120 indicates to the C program that <stddef.h> exists and should
2123 i_stdlib (i_stdlib.U):
2124 This variable conditionally defines the I_STDLIB symbol, which
2125 indicates to the C program that <stdlib.h> exists and should
2128 i_string (i_string.U):
2129 This variable conditionally defines the I_STRING symbol, which
2130 indicates that <string.h> should be included rather than <strings.h>.
2132 i_sunmath (i_sunmath.U):
2133 This variable conditionally defines the I_SUNMATH symbol, and indicates
2134 whether a C program should include <sunmath.h>.
2136 i_sysaccess (i_sysaccess.U):
2137 This variable conditionally defines the I_SYS_ACCESS symbol,
2138 and indicates whether a C program should include <sys/access.h>.
2140 i_sysdir (i_sysdir.U):
2141 This variable conditionally defines the I_SYS_DIR symbol, and indicates
2142 whether a C program should include <sys/dir.h>.
2144 i_sysfile (i_sysfile.U):
2145 This variable conditionally defines the I_SYS_FILE symbol, and indicates
2146 whether a C program should include <sys/file.h> to get R_OK and friends.
2148 i_sysfilio (i_sysioctl.U):
2149 This variable conditionally defines the I_SYS_FILIO symbol, which
2150 indicates to the C program that <sys/filio.h> exists and should
2151 be included in preference to <sys/ioctl.h>.
2154 This variable conditionally defines I_SYS_IN, which indicates
2155 to the C program that it should include <sys/in.h> instead of
2158 i_sysioctl (i_sysioctl.U):
2159 This variable conditionally defines the I_SYS_IOCTL symbol, which
2160 indicates to the C program that <sys/ioctl.h> exists and should
2163 i_syslog (i_syslog.U):
2164 This variable conditionally defines the I_SYSLOG symbol,
2165 and indicates whether a C program should include <syslog.h>.
2167 i_sysmman (i_sysmman.U):
2168 This variable conditionally defines the I_SYS_MMAN symbol, and
2169 indicates whether a C program should include <sys/mman.h>.
2171 i_sysmode (i_sysmode.U):
2172 This variable conditionally defines the I_SYSMODE symbol,
2173 and indicates whether a C program should include <sys/mode.h>.
2175 i_sysmount (i_sysmount.U):
2176 This variable conditionally defines the I_SYSMOUNT symbol,
2177 and indicates whether a C program should include <sys/mount.h>.
2179 i_sysndir (i_sysndir.U):
2180 This variable conditionally defines the I_SYS_NDIR symbol, and indicates
2181 whether a C program should include <sys/ndir.h>.
2183 i_sysparam (i_sysparam.U):
2184 This variable conditionally defines the I_SYS_PARAM symbol, and indicates
2185 whether a C program should include <sys/param.h>.
2187 i_sysresrc (i_sysresrc.U):
2188 This variable conditionally defines the I_SYS_RESOURCE symbol,
2189 and indicates whether a C program should include <sys/resource.h>.
2191 i_syssecrt (i_syssecrt.U):
2192 This variable conditionally defines the I_SYS_SECURITY symbol,
2193 and indicates whether a C program should include <sys/security.h>.
2195 i_sysselct (i_sysselct.U):
2196 This variable conditionally defines I_SYS_SELECT, which indicates
2197 to the C program that it should include <sys/select.h> in order to
2198 get the definition of struct timeval.
2200 i_syssockio (i_sysioctl.U):
2201 This variable conditionally defines I_SYS_SOCKIO to indicate to the
2202 C program that socket ioctl codes may be found in <sys/sockio.h>
2203 instead of <sys/ioctl.h>.
2205 i_sysstat (i_sysstat.U):
2206 This variable conditionally defines the I_SYS_STAT symbol,
2207 and indicates whether a C program should include <sys/stat.h>.
2209 i_sysstatfs (i_sysstatfs.U):
2210 This variable conditionally defines the I_SYSSTATFS symbol,
2211 and indicates whether a C program should include <sys/statfs.h>.
2213 i_sysstatvfs (i_sysstatvfs.U):
2214 This variable conditionally defines the I_SYSSTATVFS symbol,
2215 and indicates whether a C program should include <sys/statvfs.h>.
2217 i_systime (i_time.U):
2218 This variable conditionally defines I_SYS_TIME, which indicates
2219 to the C program that it should include <sys/time.h>.
2221 i_systimek (i_time.U):
2222 This variable conditionally defines I_SYS_TIME_KERNEL, which
2223 indicates to the C program that it should include <sys/time.h>
2224 with KERNEL defined.
2226 i_systimes (i_systimes.U):
2227 This variable conditionally defines the I_SYS_TIMES symbol, and indicates
2228 whether a C program should include <sys/times.h>.
2230 i_systypes (i_systypes.U):
2231 This variable conditionally defines the I_SYS_TYPES symbol,
2232 and indicates whether a C program should include <sys/types.h>.
2234 i_sysuio (i_sysuio.U):
2235 This variable conditionally defines the I_SYSUIO symbol, and indicates
2236 whether a C program should include <sys/uio.h>.
2238 i_sysun (i_sysun.U):
2239 This variable conditionally defines I_SYS_UN, which indicates
2240 to the C program that it should include <sys/un.h> to get UNIX
2241 domain socket definitions.
2243 i_sysutsname (i_sysutsname.U):
2244 This variable conditionally defines the I_SYSUTSNAME symbol,
2245 and indicates whether a C program should include <sys/utsname.h>.
2247 i_sysvfs (i_sysvfs.U):
2248 This variable conditionally defines the I_SYSVFS symbol,
2249 and indicates whether a C program should include <sys/vfs.h>.
2251 i_syswait (i_syswait.U):
2252 This variable conditionally defines I_SYS_WAIT, which indicates
2253 to the C program that it should include <sys/wait.h>.
2255 i_termio (i_termio.U):
2256 This variable conditionally defines the I_TERMIO symbol, which
2257 indicates to the C program that it should include <termio.h> rather
2260 i_termios (i_termio.U):
2261 This variable conditionally defines the I_TERMIOS symbol, which
2262 indicates to the C program that the POSIX <termios.h> file is
2266 This variable conditionally defines I_TIME, which indicates
2267 to the C program that it should include <time.h>.
2269 i_unistd (i_unistd.U):
2270 This variable conditionally defines the I_UNISTD symbol, and indicates
2271 whether a C program should include <unistd.h>.
2273 i_ustat (i_ustat.U):
2274 This variable conditionally defines the I_USTAT symbol, and indicates
2275 whether a C program should include <ustat.h>.
2277 i_utime (i_utime.U):
2278 This variable conditionally defines the I_UTIME symbol, and indicates
2279 whether a C program should include <utime.h>.
2281 i_values (i_values.U):
2282 This variable conditionally defines the I_VALUES symbol, and indicates
2283 whether a C program may include <values.h> to get symbols like MAXLONG
2286 i_varargs (i_varhdr.U):
2287 This variable conditionally defines I_VARARGS, which indicates
2288 to the C program that it should include <varargs.h>.
2290 i_varhdr (i_varhdr.U):
2291 Contains the name of the header to be included to get va_dcl definition.
2292 Typically one of varargs.h or stdarg.h.
2294 i_vfork (i_vfork.U):
2295 This variable conditionally defines the I_VFORK symbol, and indicates
2296 whether a C program should include vfork.h.
2298 ignore_versioned_solibs (libs.U):
2299 This variable should be non-empty if non-versioned shared
2300 libraries (libfoo.so.x.y) are to be ignored (because they
2301 cannot be linked against).
2303 inc_version_list (inc_version_list.U):
2304 This variable specifies the list of subdirectories in over
2305 which perl.c:incpush() and lib/lib.pm will automatically
2306 search when adding directories to @INC. The elements in
2307 the list are separated by spaces. This is only useful
2308 if you have a perl library directory tree structured like the
2309 default one. See INSTALL for how this works. The versioned
2310 site_perl directory was introduced in 5.005, so that is the
2311 lowest possible value.
2313 inc_version_list_init (inc_version_list.U):
2314 This variable holds the same list as inc_version_list, but
2315 each item is enclosed in double quotes and separated by commas,
2316 suitable for use in the PERL_INC_VERSION_LIST initialization.
2319 This variable must preceed the normal include path to get hte
2320 right one, as in "$incpath/usr/include" or "$incpath/usr/lib".
2321 Value can be "" or "/bsd43" on mips.
2324 This variable is defined but not used by Configure.
2325 The value is a plain '' and is not useful.
2327 installarchlib (archlib.U):
2328 This variable is really the same as archlibexp but may differ on
2329 those systems using AFS. For extra portability, only this variable
2330 should be used in makefiles.
2333 This variable is the same as binexp unless AFS is running in which case
2334 the user is explicitely prompted for it. This variable should always
2335 be used in your makefiles for maximum portability.
2337 installman1dir (man1dir.U):
2338 This variable is really the same as man1direxp, unless you are using
2339 AFS in which case it points to the read/write location whereas
2340 man1direxp only points to the read-only access location. For extra
2341 portability, you should only use this variable within your makefiles.
2343 installman3dir (man3dir.U):
2344 This variable is really the same as man3direxp, unless you are using
2345 AFS in which case it points to the read/write location whereas
2346 man3direxp only points to the read-only access location. For extra
2347 portability, you should only use this variable within your makefiles.
2349 installprefix (installprefix.U):
2350 This variable holds the name of the directory below which
2351 "make install" will install the package. For most users, this
2352 is the same as prefix. However, it is useful for
2353 installing the software into a different (usually temporary)
2354 location after which it can be bundled up and moved somehow
2355 to the final location specified by prefix.
2357 installprefixexp (installprefix.U):
2358 This variable holds the full absolute path of installprefix
2359 with all ~-expansion done.
2361 installprivlib (privlib.U):
2362 This variable is really the same as privlibexp but may differ on
2363 those systems using AFS. For extra portability, only this variable
2364 should be used in makefiles.
2366 installscript (scriptdir.U):
2367 This variable is usually the same as scriptdirexp, unless you are on
2368 a system running AFS, in which case they may differ slightly. You
2369 should always use this variable within your makefiles for portability.
2371 installsitearch (sitearch.U):
2372 This variable is really the same as sitearchexp but may differ on
2373 those systems using AFS. For extra portability, only this variable
2374 should be used in makefiles.
2376 installsitebin (sitebin.U):
2377 This variable is usually the same as sitebinexp, unless you are on
2378 a system running AFS, in which case they may differ slightly. You
2379 should always use this variable within your makefiles for portability.
2381 installsitelib (sitelib.U):
2382 This variable is really the same as sitelibexp but may differ on
2383 those systems using AFS. For extra portability, only this variable
2384 should be used in makefiles.
2386 installstyle (installstyle.U):
2387 This variable describes the "style" of the perl installation.
2388 This is intended to be useful for tools that need to
2389 manipulate entire perl distributions. Perl itself doesn't use
2390 this to find its libraries -- the library directories are
2391 stored directly in Config.pm. Currently, there are only two
2392 styles: "lib" and "lib/perl5". The default library locations
2393 (e.g. privlib, sitelib) are either $prefix/lib or
2394 $prefix/lib/perl5. The former is useful if $prefix is a
2395 directory dedicated to perl (e.g. /opt/perl), while the latter
2396 is useful if $prefix is shared by many packages, e.g. if
2398 This may later be extended to include other information, so
2399 be careful with pattern-matching on the results.
2400 For compatibility with perl5.005 and earlier, the default
2401 setting is based on whether or not $prefix contains the string
2404 installusrbinperl (instubperl.U):
2405 This variable tells whether Perl should be installed also as
2406 /usr/bin/perl in addition to
2409 installvendorarch (vendorarch.U):
2410 This variable is really the same as vendorarchexp but may differ on
2411 those systems using AFS. For extra portability, only this variable
2412 should be used in makefiles.
2414 installvendorbin (vendorbin.U):
2415 This variable is really the same as vendorbinexp but may differ on
2416 those systems using AFS. For extra portability, only this variable
2417 should be used in makefiles.
2419 installvendorlib (vendorlib.U):
2420 This variable is really the same as vendorlibexp but may differ on
2421 those systems using AFS. For extra portability, only this variable
2422 should be used in makefiles.
2424 intsize (intsize.U):
2425 This variable contains the value of the INTSIZE symbol, which
2426 indicates to the C program how many bytes there are in an int.
2428 ivdformat (perlxvf.U):
2429 This variable contains the format string used for printing
2430 a Perl IV as a signed decimal integer.
2433 This variable is the size of an IV in bytes.
2436 This variable contains the C type used for Perl's IV.
2438 known_extensions (Extensions.U):
2439 This variable holds a list of all XS extensions included in
2443 This variable is defined but not used by Configure.
2444 The value is a plain '' and is not useful.
2447 This variable indicates the program to be used to link
2448 libraries for dynamic loading. On some systems, it is 'ld'.
2449 On ELF systems, it should be $cc. Mostly, we'll try to respect
2450 the hint file setting.
2452 lddlflags (dlsrc.U):
2453 This variable contains any special flags that might need to be
2454 passed to $ld to create a shared library suitable for dynamic
2455 loading. It is up to the makefile to use it. For hpux, it
2456 should be '-b'. For sunos 4.1, it is empty.
2458 ldflags (ccflags.U):
2459 This variable contains any additional C loader flags desired by
2460 the user. It is up to the Makefile to use this.
2462 ldflags_uselargefiles (uselfs.U):
2463 This variable contains the loader flags needed by large file builds
2464 and added to ldflags by hints files.
2466 ldlibpthname (libperl.U):
2467 This variable holds the name of the shared library
2468 search path, often LD_LIBRARY_PATH. To get an empty
2469 string, the hints file must set this to 'none'.
2472 This variable is used internally by Configure to determine the
2473 full pathname (if any) of the less program. After Configure runs,
2474 the value is reset to a plain "less" and is not useful.
2477 This is an old synonym for _a.
2480 This variable contains the location of the C library.
2482 libperl (libperl.U):
2483 The perl executable is obtained by linking perlmain.c with
2484 libperl, any static extensions (usually just DynaLoader),
2485 and any other libraries needed on this system. libperl
2486 is usually libperl.a, but can also be libperl.so.xxx if
2487 the user wishes to build a perl executable with a shared
2491 This variable holds the general path (space-separated) used to find
2492 libraries. It is intended to be used by other units.
2495 This variable holds the additional libraries we want to use.
2496 It is up to the Makefile to deal with it.
2499 This variable holds the directory names aka dirnames of the libraries
2500 we found and accepted, duplicates are removed.
2503 This variable holds the filenames aka basenames of the libraries
2504 we found and accepted.
2507 This variable holds the full pathnames of the libraries
2508 we found and accepted.
2511 This variable holds the directory names probed for libraries.
2513 libswanted (Myinit.U):
2514 This variable holds a list of all the libraries we want to
2515 search. The order is chosen to pick up the c library
2516 ahead of ucb or bsd libraries for SVR4.
2518 libswanted_uselargefiles (uselfs.U):
2519 This variable contains the libraries needed by large file builds
2520 and added to ldflags by hints files. It is a space separated list
2521 of the library names without the "lib" prefix or any suffix, just
2525 This variable is defined but not used by Configure.
2526 The value is a plain '' and is not useful.
2529 This variable is defined but not used by Configure.
2530 The value is a plain '' and is not useful.
2532 lkflags (ccflags.U):
2533 This variable contains any additional C partial linker flags desired by
2534 the user. It is up to the Makefile to use this.
2537 This variable is used internally by Configure to determine the
2538 full pathname (if any) of the ln program. After Configure runs,
2539 the value is reset to a plain "ln" and is not useful.
2542 This variable holds the name of the command to make
2543 symbolic links (if they are supported). It can be used
2544 in the Makefile. It is either 'ln -s' or 'ln'
2546 locincpth (ccflags.U):
2547 This variable contains a list of additional directories to be
2548 searched by the compiler. The appropriate '-I' directives will
2549 be added to ccflags. This is intended to simplify setting
2550 local directories from the Configure command line.
2551 It's not much, but it parallels the loclibpth stuff in libpth.U.
2553 loclibpth (libpth.U):
2554 This variable holds the paths (space-separated) used to find local
2555 libraries. It is prepended to libpth, and is intended to be easily
2556 set from the command line.
2558 longdblsize (d_longdbl.U):
2559 This variable contains the value of the LONG_DOUBLESIZE symbol, which
2560 indicates to the C program how many bytes there are in a long double,
2561 if this system supports long doubles.
2563 longlongsize (d_longlong.U):
2564 This variable contains the value of the LONGLONGSIZE symbol, which
2565 indicates to the C program how many bytes there are in a long long,
2566 if this system supports long long.
2568 longsize (intsize.U):
2569 This variable contains the value of the LONGSIZE symbol, which
2570 indicates to the C program how many bytes there are in a long.
2573 This variable is defined but not used by Configure.
2574 The value is a plain '' and is not useful.
2577 This variable is defined but not used by Configure.
2578 The value is a plain '' and is not useful.
2581 This variable is used internally by Configure to determine the
2582 full pathname (if any) of the ls program. After Configure runs,
2583 the value is reset to a plain "ls" and is not useful.
2585 lseeksize (lseektype.U):
2586 This variable defines lseektype to be something like off_t, long,
2587 or whatever type is used to declare lseek offset's type in the
2588 kernel (which also appears to be lseek's return type).
2590 lseektype (lseektype.U):
2591 This variable defines lseektype to be something like off_t, long,
2592 or whatever type is used to declare lseek offset's type in the
2593 kernel (which also appears to be lseek's return type).
2596 This variable is defined but not used by Configure.
2597 The value is a plain '' and is not useful.
2600 This variable is defined but not used by Configure.
2601 The value is a plain '' and is not useful.
2604 This variable is used internally by Configure to determine the
2605 full pathname (if any) of the make program. After Configure runs,
2606 the value is reset to a plain "make" and is not useful.
2608 make_set_make (make.U):
2609 Some versions of 'make' set the variable MAKE. Others do not.
2610 This variable contains the string to be included in Makefile.SH
2611 so that MAKE is set if needed, and not if not needed.
2612 Possible values are:
2613 make_set_make='#' # If your make program handles this for you,
2614 make_set_make="MAKE=$make" # if it doesn't.
2615 I used a comment character so that we can distinguish a
2616 'set' value (from a previous config.sh or Configure '-D' option)
2617 from an uncomputed value.
2619 mallocobj (mallocsrc.U):
2620 This variable contains the name of the malloc.o that this package
2621 generates, if that malloc.o is preferred over the system malloc.
2622 Otherwise the value is null. This variable is intended for generating
2623 Makefiles. See mallocsrc.
2625 mallocsrc (mallocsrc.U):
2626 This variable contains the name of the malloc.c that comes with
2627 the package, if that malloc.c is preferred over the system malloc.
2628 Otherwise the value is null. This variable is intended for generating
2631 malloctype (mallocsrc.U):
2632 This variable contains the kind of ptr returned by malloc and realloc.
2634 man1dir (man1dir.U):
2635 This variable contains the name of the directory in which manual
2636 source pages are to be put. It is the responsibility of the
2637 Makefile.SH to get the value of this into the proper command.
2638 You must be prepared to do the ~name expansion yourself.
2640 man1direxp (man1dir.U):
2641 This variable is the same as the man1dir variable, but is filename
2642 expanded at configuration time, for convenient use in makefiles.
2644 man1ext (man1dir.U):
2645 This variable contains the extension that the manual page should
2646 have: one of 'n', 'l', or '1'. The Makefile must supply the '.'.
2649 man3dir (man3dir.U):
2650 This variable contains the name of the directory in which manual
2651 source pages are to be put. It is the responsibility of the
2652 Makefile.SH to get the value of this into the proper command.
2653 You must be prepared to do the ~name expansion yourself.
2655 man3direxp (man3dir.U):
2656 This variable is the same as the man3dir variable, but is filename
2657 expanded at configuration time, for convenient use in makefiles.
2659 man3ext (man3dir.U):
2660 This variable contains the extension that the manual page should
2661 have: one of 'n', 'l', or '3'. The Makefile must supply the '.'.
2665 This variable is used internally by Configure to determine the
2666 full pathname (if any) of the Mcc program. After Configure runs,
2667 the value is reset to a plain "Mcc" and is not useful.
2669 mips_type (usrinc.U):
2670 This variable holds the environment type for the mips system.
2671 Possible values are "BSD 4.3" and "System V".
2674 This variable is used internally by Configure to determine the
2675 full pathname (if any) of the mkdir program. After Configure runs,
2676 the value is reset to a plain "mkdir" and is not useful.
2678 mmaptype (d_mmap.U):
2679 This symbol contains the type of pointer returned by mmap()
2680 (and simultaneously the type of the first argument).
2681 It can be 'void *' or 'caddr_t'.
2683 modetype (modetype.U):
2684 This variable defines modetype to be something like mode_t,
2685 int, unsigned short, or whatever type is used to declare file
2686 modes for system calls.
2689 This variable is used internally by Configure to determine the
2690 full pathname (if any) of the more program. After Configure runs,
2691 the value is reset to a plain "more" and is not useful.
2693 multiarch (multiarch.U):
2694 This variable conditionally defines the MULTIARCH symbol
2695 which signifies the presence of multiplatform files.
2696 This is normally set by hints files.
2699 This variable is defined but not used by Configure.
2700 The value is a plain '' and is not useful.
2702 myarchname (archname.U):
2703 This variable holds the architecture name computed by Configure in
2704 a previous run. It is not intended to be perused by any user and
2705 should never be set in a hint file.
2707 mydomain (myhostname.U):
2708 This variable contains the eventual value of the MYDOMAIN symbol,
2709 which is the domain of the host the program is going to run on.
2710 The domain must be appended to myhostname to form a complete host name.
2711 The dot comes with mydomain, and need not be supplied by the program.
2713 myhostname (myhostname.U):
2714 This variable contains the eventual value of the MYHOSTNAME symbol,
2715 which is the name of the host the program is going to run on.
2716 The domain is not kept with hostname, but must be gotten from mydomain.
2717 The dot comes with mydomain, and need not be supplied by the program.
2719 myuname (Oldconfig.U):
2720 The output of 'uname -a' if available, otherwise the hostname. On Xenix,
2721 pseudo variables assignments in the output are stripped, thank you. The
2722 whole thing is then lower-cased.
2725 This variable contains the '-n' flag if that is what causes the echo
2726 command to suppress newline. Otherwise it is null. Correct usage is
2727 $echo $n "prompt for a question: $c".
2729 netdb_hlen_type (netdbtype.U):
2730 This variable holds the type used for the 2nd argument to
2731 gethostbyaddr(). Usually, this is int or size_t or unsigned.
2732 This is only useful if you have gethostbyaddr(), naturally.
2734 netdb_host_type (netdbtype.U):
2735 This variable holds the type used for the 1st argument to
2736 gethostbyaddr(). Usually, this is char * or void *, possibly
2737 with or without a const prefix.
2738 This is only useful if you have gethostbyaddr(), naturally.
2740 netdb_name_type (netdbtype.U):
2741 This variable holds the type used for the argument to
2742 gethostbyname(). Usually, this is char * or const char *.
2743 This is only useful if you have gethostbyname(), naturally.
2745 netdb_net_type (netdbtype.U):
2746 This variable holds the type used for the 1st argument to
2747 getnetbyaddr(). Usually, this is int or long.
2748 This is only useful if you have getnetbyaddr(), naturally.
2751 This variable is used internally by Configure to determine the
2752 full pathname (if any) of the nm program. After Configure runs,
2753 the value is reset to a plain "nm" and is not useful.
2756 This variable holds the options that may be necessary for nm.
2758 nm_so_opt (usenm.U):
2759 This variable holds the options that may be necessary for nm
2760 to work on a shared library but that can not be used on an
2761 archive library. Currently, this is only used by Linux, where
2762 nm --dynamic is *required* to get symbols from an ELF library which
2763 has been stripped, but nm --dynamic is *fatal* on an archive library.
2764 Maybe Linux should just always set usenm=false.
2766 nonxs_ext (Extensions.U):
2767 This variable holds a list of all non-xs extensions included
2768 in the package. All of them will be built.
2771 This variable is used internally by Configure to determine the
2772 full pathname (if any) of the nroff program. After Configure runs,
2773 the value is reset to a plain "nroff" and is not useful.
2775 nveformat (perlxvf.U):
2776 This variable contains the format string used for printing
2777 a Perl NV using %e-ish floating point format.
2779 nvEUformat (perlxvf.U):
2780 This variable contains the format string used for printing
2781 a Perl NV using %E-ish floating point format.
2783 nvfformat (perlxvf.U):
2784 This variable confains the format string used for printing
2785 a Perl NV using %f-ish floating point format.
2787 nvFUformat (perlxvf.U):
2788 This variable confains the format string used for printing
2789 a Perl NV using %F-ish floating point format.
2791 nvgformat (perlxvf.U):
2792 This variable contains the format string used for printing
2793 a Perl NV using %g-ish floating point format.
2795 nvGUformat (perlxvf.U):
2796 This variable contains the format string used for printing
2797 a Perl NV using %G-ish floating point format.
2800 This variable is the size of an NV in bytes.
2803 This variable contains the C type used for Perl's NV.
2805 o_nonblock (nblock_io.U):
2806 This variable bears the symbol value to be used during open() or fcntl()
2807 to turn on non-blocking I/O for a file descriptor. If you wish to switch
2808 between blocking and non-blocking, you may try ioctl(FIOSNBIO) instead,
2809 but that is only supported by some devices.
2812 This is an old synonym for _o.
2814 old_pthread_create_joinable (d_pthrattrj.U):
2815 This variable defines the constant to use for creating joinable
2816 (aka undetached) pthreads. Unused if pthread.h defines
2817 PTHREAD_CREATE_JOINABLE. If used, possible values are
2818 PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
2820 optimize (ccflags.U):
2821 This variable contains any optimizer/debugger flag that should be used.
2822 It is up to the Makefile to use it.
2824 orderlib (orderlib.U):
2825 This variable is "true" if the components of libraries must be ordered
2826 (with `lorder $* | tsort`) before placing them in an archive. Set to
2827 "false" if ranlib or ar can generate random libraries.
2829 osname (Oldconfig.U):
2830 This variable contains the operating system name (e.g. sunos,
2831 solaris, hpux, etc.). It can be useful later on for setting
2832 defaults. Any spaces are replaced with underscores. It is set
2833 to a null string if we can't figure it out.
2835 osvers (Oldconfig.U):
2836 This variable contains the operating system version (e.g.
2837 4.1.3, 5.2, etc.). It is primarily used for helping select
2838 an appropriate hints file, but might be useful elsewhere for
2839 setting defaults. It is set to '' if we can't figure it out.
2840 We try to be flexible about how much of the version number
2841 to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the
2842 same for this package, hints files might just be os_4.0 or
2843 os_4.1, etc., not keeping separate files for each little release.
2845 otherlibdirs (otherlibdirs.U):
2846 This variable contains a colon-separated set of paths for the perl
2847 binary to search for additional library files or modules.
2848 These directories will be tacked to the end of @INC.
2849 Perl will automatically search below each path for version-
2850 and architecture-specific directories. See inc_version_list
2852 A value of ' ' means 'none' and is used to preserve this value
2853 for the next run through Configure.
2855 package (package.U):
2856 This variable contains the name of the package being constructed.
2857 It is primarily intended for the use of later Configure units.
2860 This variable contains the name of the preferred pager on the system.
2861 Usual values are (the full pathnames of) more, less, pg, or cat.
2864 This variable contains a command that produces the text of the
2865 /etc/passwd file. This is normally "cat /etc/passwd", but can be
2866 "ypcat passwd" when NIS is used.
2867 On some systems, such as os390, there may be no equivalent
2868 command, in which case this variable is unset.
2870 patchlevel (patchlevel.U):
2871 The patchlevel level of this package.
2872 The value of patchlevel comes from the patchlevel.h file.
2873 In a version number such as 5.6.1, this is the "6".
2874 In patchlevel.h, this is referred to as "PERL_VERSION".
2877 This is an old synonym for p_ in Head.U, the character
2878 used to separate elements in the command shell search PATH.
2881 This variable contains the full path (if any) to a previously
2882 installed perl5.005 or later suitable for running the script
2883 to determine inc_version_list.
2886 This variable is defined but not used by Configure.
2887 The value is a plain '' and is not useful.
2889 PERL_REVISION (Oldsyms.U):
2890 In a Perl version number such as 5.6.2, this is the 5.
2891 This value is manually set in patchlevel.h
2893 PERL_SUBVERSION (Oldsyms.U):
2894 In a Perl version number such as 5.6.2, this is the 2.
2895 Values greater than 50 represent potentially unstable
2896 development subversions.
2897 This value is manually set in patchlevel.h
2899 PERL_VERSION (Oldsyms.U):
2900 In a Perl version number such as 5.6.2, this is the 6.
2901 This value is manually set in patchlevel.h
2903 perladmin (perladmin.U):
2904 Electronic mail address of the perl5 administrator.
2907 The list of libraries needed by Perl only (any libraries needed
2908 by extensions only will by dropped, if using dynamic loading).
2910 perlpath (perlpath.U):
2911 This variable contains the eventual value of the PERLPATH symbol,
2912 which contains the name of the perl interpreter to be used in
2913 shell scripts and in the "eval 'exec'" idiom.
2916 This variable is used internally by Configure to determine the
2917 full pathname (if any) of the pg program. After Configure runs,
2918 the value is reset to a plain "pg" and is not useful.
2920 phostname (myhostname.U):
2921 This variable contains the eventual value of the PHOSTNAME symbol,
2922 which is a command that can be fed to popen() to get the host name.
2923 The program should probably not presume that the domain is or isn't
2926 pidtype (pidtype.U):
2927 This variable defines PIDTYPE to be something like pid_t, int,
2928 ushort, or whatever type is used to declare process ids in the kernel.
2931 Holds the private path used by Configure to find out the libraries.
2932 Its value is prepend to libpth. This variable takes care of special
2933 machines, like the mips. Usually, it should be empty.
2935 pm_apiversion (xs_apiversion.U):
2936 This variable contains the version of the oldest perl
2937 compatible with the present perl. (That is, pure perl modules
2938 written for $pm_apiversion will still work for the current
2939 version). perl.c:incpush() and lib/lib.pm will automatically
2940 search in $sitelib for older directories across major versions
2941 back to pm_apiversion. This is only useful if you have a perl
2942 library directory tree structured like the default one. The
2943 versioned site_perl library was introduced in 5.005, so that's
2944 the default setting for this variable. It's hard to imagine
2945 it changing before Perl6. It is included here for symmetry
2946 with xs_apiveprsion -- the searching algorithms will
2947 (presumably) be similar.
2948 See the INSTALL file for how this works.
2951 This variable is defined but not used by Configure.
2952 The value is a plain '' and is not useful.
2955 This variable is defined but not used by Configure.
2956 The value is a plain '' and is not useful.
2959 This variable holds the name of the directory below which the
2960 user will install the package. Usually, this is /usr/local, and
2961 executables go in /usr/local/bin, library stuff in /usr/local/lib,
2962 man pages in /usr/local/man, etc. It is only used to set defaults
2963 for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
2965 prefixexp (prefix.U):
2966 This variable holds the full absolute path of the directory below
2967 which the user will install the package. Derived from prefix.
2969 privlib (privlib.U):
2970 This variable contains the eventual value of the PRIVLIB symbol,
2971 which is the name of the private library for this package. It may
2972 have a ~ on the front. It is up to the makefile to eventually create
2973 this directory while performing installation (with ~ substitution).
2975 privlibexp (privlib.U):
2976 This variable is the ~name expanded version of privlib, so that you
2977 may use it directly in Makefiles or shell scripts.
2979 prototype (prototype.U):
2980 This variable holds the eventual value of CAN_PROTOTYPE, which
2981 indicates the C compiler can handle funciton prototypes.
2983 ptrsize (ptrsize.U):
2984 This variable contains the value of the PTRSIZE symbol, which
2985 indicates to the C program how many bytes there are in a pointer.
2987 quadkind (quadtype.U):
2988 This variable, if defined, encodes the type of a quad:
2989 1 = int, 2 = long, 3 = long long, 4 = int64_t.
2991 quadtype (quadtype.U):
2992 This variable defines Quad_t to be something like long, int,
2993 long long, int64_t, or whatever type is used for 64-bit integers.
2995 randbits (randfunc.U):
2996 Indicates how many bits are produced by the function used to
2997 generate normalized random numbers.
2999 randfunc (randfunc.U):
3000 Indicates the name of the random number function to use.
3001 Values include drand48, random, and rand. In C programs,
3002 the 'Drand01' macro is defined to generate uniformly distributed
3003 random numbers over the range [0., 1.[ (see drand01 and nrand).
3005 randseedtype (randfunc.U):
3006 Indicates the type of the argument of the seedfunc.
3008 ranlib (orderlib.U):
3009 This variable is set to the pathname of the ranlib program, if it is
3010 needed to generate random libraries. Set to ":" if ar can generate
3011 random libraries or if random libraries are not supported
3013 rd_nodata (nblock_io.U):
3014 This variable holds the return code from read() when no data is
3015 present. It should be -1, but some systems return 0 when O_NDELAY is
3016 used, which is a shame because you cannot make the difference between
3017 no data and an EOF.. Sigh!
3019 revision (patchlevel.U):
3020 The value of revision comes from the patchlevel.h file.
3021 In a version number such as 5.6.1, this is the "5".
3022 In patchlevel.h, this is referred to as "PERL_REVISION".
3025 This variable is used internally by Configure to determine the
3026 full pathname (if any) of the rm program. After Configure runs,
3027 the value is reset to a plain "rm" and is not useful.
3030 This variable is defined but not used by Configure.
3031 The value is a plain '' and is not useful.
3034 This variable contains 'true' or 'false' depending whether the
3035 nm extraction should be performed or not, according to the value
3036 of usenm and the flags on the Configure command line.
3038 sched_yield (d_pthread_y.U):
3039 This variable defines the way to yield the execution
3040 of the current thread.
3042 scriptdir (scriptdir.U):
3043 This variable holds the name of the directory in which the user wants
3044 to put publicly scripts for the package in question. It is either
3045 the same directory as for binaries, or a special one that can be
3046 mounted across different architectures, like /usr/share. Programs
3047 must be prepared to deal with ~name expansion.
3049 scriptdirexp (scriptdir.U):
3050 This variable is the same as scriptdir, but is filename expanded
3051 at configuration time, for programs not wanting to bother with it.
3054 This variable is used internally by Configure to determine the
3055 full pathname (if any) of the sed program. After Configure runs,
3056 the value is reset to a plain "sed" and is not useful.
3058 seedfunc (randfunc.U):
3059 Indicates the random number generating seed function.
3060 Values include srand48, srandom, and srand.
3062 selectminbits (selectminbits.U):
3063 This variable holds the minimum number of bits operated by select.
3064 That is, if you do select(n, ...), how many bits at least will be
3065 cleared in the masks if some activity is detected. Usually this
3066 is either n or 32*ceil(n/32), especially many little-endians do
3067 the latter. This is only useful if you have select(), naturally.
3069 selecttype (selecttype.U):
3070 This variable holds the type used for the 2nd, 3rd, and 4th
3071 arguments to select. Usually, this is 'fd_set *', if HAS_FD_SET
3072 is defined, and 'int *' otherwise. This is only useful if you
3073 have select(), naturally.
3076 This variable is defined but not used by Configure.
3077 The value is a plain '' and is not useful.
3080 This variable contains the full pathname of the shell used
3081 on this system to execute Bourne shell scripts. Usually, this will be
3082 /bin/sh, though it's possible that some systems will have /bin/ksh,
3083 /bin/pdksh, /bin/ash, /bin/bash, or even something such as
3085 This unit comes before Options.U, so you can't set sh with a '-D'
3086 option, though you can override this (and startsh)
3087 with '-O -Dsh=/bin/whatever -Dstartsh=whatever'
3090 This variable is defined but not used by Configure.
3091 The value is a plain '' and is not useful.
3093 sharpbang (spitshell.U):
3094 This variable contains the string #! if this system supports that
3097 shmattype (d_shmat.U):
3098 This symbol contains the type of pointer returned by shmat().
3099 It can be 'void *' or 'char *'.
3101 shortsize (intsize.U):
3102 This variable contains the value of the SHORTSIZE symbol which
3103 indicates to the C program how many bytes there are in a short.
3105 shrpenv (libperl.U):
3106 If the user builds a shared libperl.so, then we need to tell the
3107 'perl' executable where it will be able to find the installed libperl.so.
3108 One way to do this on some systems is to set the environment variable
3109 LD_RUN_PATH to the directory that will be the final location of the
3110 shared libperl.so. The makefile can use this with something like
3111 $shrpenv $(CC) -o perl perlmain.o $libperl $libs
3113 shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
3116 See the main perl Makefile.SH for actual working usage.
3117 Alternatively, we might be able to use a command line option such
3118 as -R $archlibexp/CORE (Solaris, NetBSD) or -Wl,-rpath
3119 $archlibexp/CORE (Linux).
3121 shsharp (spitshell.U):
3122 This variable tells further Configure units whether your sh can
3125 sig_count (sig_name.U):
3126 This variable holds a number larger than the largest valid
3127 signal number. This is usually the same as the NSIG macro.
3129 sig_name (sig_name.U):
3130 This variable holds the signal names, space separated. The leading
3131 SIG in signal name is removed. A ZERO is prepended to the
3132 list. This is currently not used.
3134 sig_name_init (sig_name.U):
3135 This variable holds the signal names, enclosed in double quotes and
3136 separated by commas, suitable for use in the SIG_NAME definition
3137 below. A "ZERO" is prepended to the list, and the list is
3138 terminated with a plain 0. The leading SIG in signal names
3139 is removed. See sig_num.
3141 sig_num (sig_name.U):
3142 This variable holds the signal numbers, space separated. A ZERO is
3143 prepended to the list (corresponding to the fake SIGZERO), and
3144 the list is terminated with a 0. Those numbers correspond to
3145 the value of the signal listed in the same place within the
3148 sig_num_init (sig_name.U):
3149 This variable holds the signal numbers, enclosed in double quotes and
3150 separated by commas, suitable for use in the SIG_NUM definition
3151 below. A "ZERO" is prepended to the list, and the list is
3152 terminated with a plain 0.
3154 signal_t (d_voidsig.U):
3155 This variable holds the type of the signal handler (void or int).
3157 sitearch (sitearch.U):
3158 This variable contains the eventual value of the SITEARCH symbol,
3159 which is the name of the private library for this package. It may
3160 have a ~ on the front. It is up to the makefile to eventually create
3161 this directory while performing installation (with ~ substitution).
3162 The standard distribution will put nothing in this directory.
3163 After perl has been installed, users may install their own local
3164 architecture-dependent modules in this directory with
3165 MakeMaker Makefile.PL
3166 or equivalent. See INSTALL for details.
3168 sitearchexp (sitearch.U):
3169 This variable is the ~name expanded version of sitearch, so that you
3170 may use it directly in Makefiles or shell scripts.
3172 sitebin (sitebin.U):
3173 This variable holds the name of the directory in which the user wants
3174 to put add-on publicly executable files for the package in question. It
3175 is most often a local directory such as /usr/local/bin. Programs using
3176 this variable must be prepared to deal with ~name substitution.
3177 The standard distribution will put nothing in this directory.
3178 After perl has been installed, users may install their own local
3179 executables in this directory with
3180 MakeMaker Makefile.PL
3181 or equivalent. See INSTALL for details.
3183 sitebinexp (sitebin.U):
3184 This is the same as the sitebin variable, but is filename expanded at
3185 configuration time, for use in your makefiles.
3187 sitelib (sitelib.U):
3188 This variable contains the eventual value of the SITELIB symbol,
3189 which is the name of the private library for this package. It may
3190 have a ~ on the front. It is up to the makefile to eventually create
3191 this directory while performing installation (with ~ substitution).
3192 The standard distribution will put nothing in this directory.
3193 After perl has been installed, users may install their own local
3194 architecture-independent modules in this directory with
3195 MakeMaker Makefile.PL
3196 or equivalent. See INSTALL for details.
3198 sitelib_stem (sitelib.U):
3199 This variable is $sitelibexp with any trailing version-specific component
3200 removed. The elements in inc_version_list (inc_version_list.U) can
3201 be tacked onto this variable to generate a list of directories to search.
3203 sitelibexp (sitelib.U):
3204 This variable is the ~name expanded version of sitelib, so that you
3205 may use it directly in Makefiles or shell scripts.
3207 siteprefix (siteprefix.U):
3208 This variable holds the full absolute path of the directory below
3209 which the user will install add-on packages.
3210 See INSTALL for usage and examples.
3212 siteprefixexp (siteprefix.U):
3213 This variable holds the full absolute path of the directory below
3214 which the user will install add-on packages. Derived from siteprefix.
3216 sizesize (sizesize.U):
3217 This variable contains the size of a sizetype in bytes.
3219 sizetype (sizetype.U):
3220 This variable defines sizetype to be something like size_t,
3221 unsigned long, or whatever type is used to declare length
3222 parameters for string functions.
3225 This variable is defined but not used by Configure.
3226 The value is a plain '' and is not useful.
3229 This variable is defined but not used by Configure.
3230 The value is a plain '' and is not useful.
3233 This variable holds the extension used to identify shared libraries
3234 (also known as shared objects) on the system. Usually set to 'so'.
3236 sockethdr (d_socket.U):
3237 This variable has any cpp '-I' flags needed for socket support.
3239 socketlib (d_socket.U):
3240 This variable has the names of any libraries needed for socket support.
3242 socksizetype (socksizetype.U):
3243 This variable holds the type used for the size argument
3244 for various socket calls like accept. Usual values include
3245 socklen_t, size_t, and int.
3248 This variable is used internally by Configure to determine the
3249 full pathname (if any) of the sort program. After Configure runs,
3250 the value is reset to a plain "sort" and is not useful.
3252 spackage (package.U):
3253 This variable contains the name of the package being constructed,
3254 with the first letter uppercased, i.e. suitable for starting
3257 spitshell (spitshell.U):
3258 This variable contains the command necessary to spit out a runnable
3259 shell on this system. It is either cat or a grep '-v' for # comments.
3261 sPRId64 (quadfio.U):
3262 This variable, if defined, contains the string used by stdio to
3263 format 64-bit decimal numbers (format 'd') for output.
3265 sPRIeldbl (longdblfio.U):
3266 This variable, if defined, contains the string used by stdio to
3267 format long doubles (format 'e') for output.
3269 sPRIEUldbl (longdblfio.U):
3270 This variable, if defined, contains the string used by stdio to
3271 format long doubles (format 'E') for output.
3272 The 'U' in the name is to separate this from sPRIeldbl so that even
3273 case-blind systems can see the difference.
3275 sPRIfldbl (longdblfio.U):
3276 This variable, if defined, contains the string used by stdio to
3277 format long doubles (format 'f') for output.
3279 sPRIFUldbl (longdblfio.U):
3280 This variable, if defined, contains the string used by stdio to
3281 format long doubles (format 'F') for output.
3282 The 'U' in the name is to separate this from sPRIfldbl so that even
3283 case-blind systems can see the difference.
3285 sPRIgldbl (longdblfio.U):
3286 This variable, if defined, contains the string used by stdio to
3287 format long doubles (format 'g') for output.
3289 sPRIGUldbl (longdblfio.U):
3290 This variable, if defined, contains the string used by stdio to
3291 format long doubles (format 'G') for output.
3292 The 'U' in the name is to separate this from sPRIgldbl so that even
3293 case-blind systems can see the difference.
3295 sPRIi64 (quadfio.U):
3296 This variable, if defined, contains the string used by stdio to
3297 format 64-bit decimal numbers (format 'i') for output.
3299 sPRIo64 (quadfio.U):
3300 This variable, if defined, contains the string used by stdio to
3301 format 64-bit octal numbers (format 'o') for output.
3303 sPRIu64 (quadfio.U):
3304 This variable, if defined, contains the string used by stdio to
3305 format 64-bit unsigned decimal numbers (format 'u') for output.
3307 sPRIx64 (quadfio.U):
3308 This variable, if defined, contains the string used by stdio to
3309 format 64-bit hexadecimal numbers (format 'x') for output.
3311 sPRIXU64 (quadfio.U):
3312 This variable, if defined, contains the string used by stdio to
3313 format 64-bit hExADECimAl numbers (format 'X') for output.
3314 The 'U' in the name is to separate this from sPRIx64 so that even
3315 case-blind systems can see the difference.
3318 This variable holds the path to the package source. It is up to
3319 the Makefile to use this variable and set VPATH accordingly to
3320 find the sources remotely.
3322 sSCNfldbl (longdblfio.U):
3323 This variable, if defined, contains the string used by stdio to
3324 format long doubles (format 'f') for input.
3326 ssizetype (ssizetype.U):
3327 This variable defines ssizetype to be something like ssize_t,
3328 long or int. It is used by functions that return a count
3329 of bytes or an error condition. It must be a signed type.
3330 We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
3332 startperl (startperl.U):
3333 This variable contains the string to put on the front of a perl
3334 script to make sure (hopefully) that it runs with perl and not some
3335 shell. Of course, that leading line must be followed by the classical
3337 eval 'exec perl -S $0 ${1+"$@"}'
3338 if $running_under_some_shell;
3339 to guarantee perl startup should the shell execute the script. Note
3340 that this magic incatation is not understood by csh.
3342 startsh (startsh.U):
3343 This variable contains the string to put on the front of a shell
3344 script to make sure (hopefully) that it runs with sh and not some
3347 static_ext (Extensions.U):
3348 This variable holds a list of XS extension files we want to
3349 link statically into the package. It is used by Makefile.
3351 stdchar (stdchar.U):
3352 This variable conditionally defines STDCHAR to be the type of char
3353 used in stdio.h. It has the values "unsigned char" or "char".
3355 stdio_base (d_stdstdio.U):
3356 This variable defines how, given a FILE pointer, fp, to access the
3357 _base field (or equivalent) of stdio.h's FILE structure. This will
3358 be used to define the macro FILE_base(fp).
3360 stdio_bufsiz (d_stdstdio.U):
3361 This variable defines how, given a FILE pointer, fp, to determine
3362 the number of bytes store in the I/O buffer pointer to by the
3363 _base field (or equivalent) of stdio.h's FILE structure. This will
3364 be used to define the macro FILE_bufsiz(fp).
3366 stdio_cnt (d_stdstdio.U):
3367 This variable defines how, given a FILE pointer, fp, to access the
3368 _cnt field (or equivalent) of stdio.h's FILE structure. This will
3369 be used to define the macro FILE_cnt(fp).
3371 stdio_filbuf (d_stdstdio.U):
3372 This variable defines how, given a FILE pointer, fp, to tell
3373 stdio to refill it's internal buffers (?). This will
3374 be used to define the macro FILE_filbuf(fp).
3376 stdio_ptr (d_stdstdio.U):
3377 This variable defines how, given a FILE pointer, fp, to access the
3378 _ptr field (or equivalent) of stdio.h's FILE structure. This will
3379 be used to define the macro FILE_ptr(fp).
3381 stdio_stream_array (stdio_streams.U):
3382 This variable tells the name of the array holding the stdio streams.
3383 Usual values include _iob, __iob, and __sF.
3385 strings (i_string.U):
3386 This variable holds the full path of the string header that will be
3387 used. Typically /usr/include/string.h or /usr/include/strings.h.
3390 This variable is defined but not used by Configure.
3391 The value is a plain '' and is not useful.
3393 subversion (patchlevel.U):
3394 The subversion level of this package.
3395 The value of subversion comes from the patchlevel.h file.
3396 In a version number such as 5.6.1, this is the "1".
3397 In patchlevel.h, this is referred to as "PERL_SUBVERSION".
3398 This is unique to perl.
3401 This variable holds the place where the manual is located on this
3402 system. It is not the place where the user wants to put his manual
3403 pages. Rather it is the place where Configure may look to find manual
3404 for unix commands (section 1 of the manual usually). See mansrc.
3407 This variable is defined but not used by Configure.
3408 The value is a plain '' and is not useful.
3411 This variable is defined but not used by Configure.
3412 The value is a plain '' and is not useful.
3415 This variable is defined but not used by Configure.
3416 The value is a plain '' and is not useful.
3419 This variable is defined but not used by Configure.
3420 The value is a plain '' and is not useful.
3423 This variable is used internally by Configure to determine the
3424 full pathname (if any) of the test program. After Configure runs,
3425 the value is reset to a plain "test" and is not useful.
3427 timeincl (i_time.U):
3428 This variable holds the full path of the included time header(s).
3430 timetype (d_time.U):
3431 This variable holds the type returned by time(). It can be long,
3432 or time_t on BSD sites (in which case <sys/types.h> should be
3433 included). Anyway, the type Time_t should be used.
3436 This variable is used internally by Configure to determine the
3437 full pathname (if any) of the touch program. After Configure runs,
3438 the value is reset to a plain "touch" and is not useful.
3441 This variable is used internally by Configure to determine the
3442 full pathname (if any) of the tr program. After Configure runs,
3443 the value is reset to a plain "tr" and is not useful.
3446 This variable contains the value to be passed to the tr(1)
3447 command to transliterate a newline. Typical values are
3448 '\012' and '\n'. This is needed for EBCDIC systems where
3449 newline is not necessarily '\012'.
3452 This variable is defined but not used by Configure.
3453 The value is a plain '' and is not useful.
3456 This variable is the size of an U16 in bytes.
3459 This variable contains the C type used for Perl's U16.
3462 This variable is the size of an U32 in bytes.
3465 This variable contains the C type used for Perl's U32.
3468 This variable is the size of an U64 in bytes.
3471 This variable contains the C type used for Perl's U64.
3474 This variable is the size of an U8 in bytes.
3477 This variable contains the C type used for Perl's U8.
3480 This variable contains the format string used for printing a Uid_t.
3482 uidsign (uidsign.U):
3483 This variable contains the signedness of a uidtype.
3484 1 for unsigned, -1 for signed.
3486 uidsize (uidsize.U):
3487 This variable contains the size of a uidtype in bytes.
3489 uidtype (uidtype.U):
3490 This variable defines Uid_t to be something like uid_t, int,
3491 ushort, or whatever type is used to declare user ids in the kernel.
3494 This variable is used internally by Configure to determine the
3495 full pathname (if any) of the uname program. After Configure runs,
3496 the value is reset to a plain "uname" and is not useful.
3499 This variable is used internally by Configure to determine the
3500 full pathname (if any) of the uniq program. After Configure runs,
3501 the value is reset to a plain "uniq" and is not useful.
3503 uquadtype (quadtype.U):
3504 This variable defines Uquad_t to be something like unsigned long,
3505 unsigned int, unsigned long long, uint64_t, or whatever type is
3506 used for 64-bit integers.
3508 use5005threads (usethreads.U):
3509 This variable conditionally defines the USE_5005THREADS symbol,
3510 and indicates that Perl should be built to use the 5.005-based
3511 threading implementation.
3513 use64bitall (use64bits.U):
3514 This variable conditionally defines the USE_64_BIT_ALL symbol,
3515 and indicates that 64-bit integer types should be used
3516 when available. The maximal possible
3517 64-bitness is employed: LP64 or ILP64, meaning that you will
3518 be able to use more than 2 gigabytes of memory. This mode is
3519 even more binary incompatible than USE_64_BIT_INT. You may not
3520 be able to run the resulting executable in a 32-bit CPU at all or
3521 you may need at least to reboot your OS to 64-bit mode.
3523 use64bitint (use64bits.U):
3524 This variable conditionally defines the USE_64_BIT_INT symbol,
3525 and indicates that 64-bit integer types should be used
3526 when available. The minimal possible 64-bitness
3527 is employed, just enough to get 64-bit integers into Perl.
3528 This may mean using for example "long longs", while your memory
3529 may still be limited to 2 gigabytes.
3532 This variable indicates if the system supports dynamic
3533 loading of some sort. See also dlsrc and dlobj.
3535 useithreads (usethreads.U):
3536 This variable conditionally defines the USE_ITHREADS symbol,
3537 and indicates that Perl should be built to use the interpreter-based
3538 threading implementation.
3540 uselargefiles (uselfs.U):
3541 This variable conditionally defines the USE_LARGE_FILES symbol,
3542 and indicates that large file interfaces should be used when
3545 uselongdouble (uselongdbl.U):
3546 This variable conditionally defines the USE_LONG_DOUBLE symbol,
3547 and indicates that long doubles should be used when available.
3549 usemorebits (usemorebits.U):
3550 This variable conditionally defines the USE_MORE_BITS symbol,
3551 and indicates that explicit 64-bit interfaces and long doubles
3552 should be used when available.
3554 usemultiplicity (usemultiplicity.U):
3555 This variable conditionally defines the MULTIPLICITY symbol,
3556 and indicates that Perl should be built to use multiplicity.
3558 usemymalloc (mallocsrc.U):
3559 This variable contains y if the malloc that comes with this package
3560 is desired over the system's version of malloc. People often include
3561 special versions of malloc for effiency, but such versions are often
3562 less portable. See also mallocsrc and mallocobj.
3563 If this is 'y', then -lmalloc is removed from $libs.
3566 This variable contains 'true' or 'false' depending whether the
3567 nm extraction is wanted or not.
3569 useopcode (Extensions.U):
3570 This variable holds either 'true' or 'false' to indicate
3571 whether the Opcode extension should be used. The sole
3572 use for this currently is to allow an easy mechanism
3573 for users to skip the Opcode extension from the Configure
3576 useperlio (useperlio.U):
3577 This variable conditionally defines the USE_PERLIO symbol,
3578 and indicates that the PerlIO abstraction should be
3581 useposix (Extensions.U):
3582 This variable holds either 'true' or 'false' to indicate
3583 whether the POSIX extension should be used. The sole
3584 use for this currently is to allow an easy mechanism
3585 for hints files to indicate that POSIX will not compile
3586 on a particular system.
3589 This variable is set to true when the user agrees to use sfio.
3590 It is set to false when sfio is not available or when the user
3591 explicitely requests not to use sfio. It is here primarily so
3592 that command-line settings can override the auto-detection of
3593 d_sfio without running into a "WHOA THERE".
3595 useshrplib (libperl.U):
3596 This variable is set to 'yes' if the user wishes
3597 to build a shared libperl, and 'no' otherwise.
3599 usesocks (usesocks.U):
3600 This variable conditionally defines the USE_SOCKS symbol,
3601 and indicates that Perl should be built to use SOCKS.
3603 usethreads (usethreads.U):
3604 This variable conditionally defines the USE_THREADS symbol,
3605 and indicates that Perl should be built to use threads.
3607 usevendorprefix (vendorprefix.U):
3608 This variable tells whether the vendorprefix
3609 and consequently other vendor* paths are in use.
3611 usevfork (d_vfork.U):
3612 This variable is set to true when the user accepts to use vfork.
3613 It is set to false when no vfork is available or when the user
3614 explicitely requests not to use vfork.
3617 This variable holds the path of the include files, which is
3618 usually /usr/include. It is mainly used by other Configure units.
3621 This variable is defined but not used by Configure.
3622 The value is a plain '' and is not useful.
3624 uvoformat (perlxvf.U):
3625 This variable contains the format string used for printing
3626 a Perl UV as an unsigned octal integer.
3629 This variable is the size of a UV in bytes.
3632 This variable contains the C type used for Perl's UV.
3634 uvuformat (perlxvf.U):
3635 This variable contains the format string used for printing
3636 a Perl UV as an unsigned decimal integer.
3638 uvxformat (perlxvf.U):
3639 This variable contains the format string used for printing
3640 a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
3642 uvXUformat (perlxvf.U):
3643 This variable contains the format string used for printing
3644 a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
3646 vendorarch (vendorarch.U):
3647 This variable contains the value of the PERL_VENDORARCH symbol.
3648 It may have a ~ on the front.
3649 The standard distribution will put nothing in this directory.
3650 Vendors who distribute perl may wish to place their own
3651 architecture-dependent modules and extensions in this directory with
3652 MakeMaker Makefile.PL INSTALLDIRS=vendor
3653 or equivalent. See INSTALL for details.
3655 vendorarchexp (vendorarch.U):
3656 This variable is the ~name expanded version of vendorarch, so that you
3657 may use it directly in Makefiles or shell scripts.
3659 vendorbin (vendorbin.U):
3660 This variable contains the eventual value of the VENDORBIN symbol.
3661 It may have a ~ on the front.
3662 The standard distribution will put nothing in this directory.
3663 Vendors who distribute perl may wish to place additional
3664 binaries in this directory with
3665 MakeMaker Makefile.PL INSTALLDIRS=vendor
3666 or equivalent. See INSTALL for details.
3668 vendorbinexp (vendorbin.U):
3669 This variable is the ~name expanded version of vendorbin, so that you
3670 may use it directly in Makefiles or shell scripts.
3672 vendorlib (vendorlib.U):
3673 This variable contains the eventual value of the VENDORLIB symbol,
3674 which is the name of the private library for this package.
3675 The standard distribution will put nothing in this directory.
3676 Vendors who distribute perl may wish to place their own
3677 modules in this directory with
3678 MakeMaker Makefile.PL INSTALLDIRS=vendor
3679 or equivalent. See INSTALL for details.
3681 vendorlib_stem (vendorlib.U):
3682 This variable is $vendorlibexp with any trailing version-specific component
3683 removed. The elements in inc_version_list (inc_version_list.U) can
3684 be tacked onto this variable to generate a list of directories to search.
3686 vendorlibexp (vendorlib.U):
3687 This variable is the ~name expanded version of vendorlib, so that you
3688 may use it directly in Makefiles or shell scripts.
3690 vendorprefix (vendorprefix.U):
3691 This variable holds the full absolute path of the directory below
3692 which the vendor will install add-on packages.
3693 See INSTALL for usage and examples.
3695 vendorprefixexp (vendorprefix.U):
3696 This variable holds the full absolute path of the directory below
3697 which the vendor will install add-on packages. Derived from vendorprefix.
3699 version (patchlevel.U):
3700 The full version number of this package, such as 5.6.1 (or 5_6_1).
3701 This combines revision, patchlevel, and subversion to get the
3702 full version number, including any possible subversions.
3703 This is suitable for use as a directory name, and hence is
3704 filesystem dependent.
3706 versiononly (versiononly.U):
3707 If set, this symbol indicates that only the version-specific
3708 components of a perl installation should be installed.
3709 This may be useful for making a test installation of a new
3710 version without disturbing the existing installation.
3711 Setting versiononly is equivalent to setting installperl's -v option.
3712 In particular, the non-versioned scripts and programs such as
3713 a2p, c2ph, h2xs, pod2*, and perldoc are not installed
3714 (see INSTALL for a more complete list). Nor are the man
3716 Usually, this is undef.
3719 This variable is defined but not used by Configure.
3720 The value is a plain '' and is not useful.
3722 voidflags (voidflags.U):
3723 This variable contains the eventual value of the VOIDFLAGS symbol,
3724 which indicates how much support of the void type is given by this
3725 compiler. See VOIDFLAGS for more info.
3728 This variable holds extra path (space-separated) used to find
3729 libraries on this platform, for example CPU-specific libraries
3730 (on multi-CPU platforms) may be listed here.
3732 xs_apiversion (xs_apiversion.U):
3733 This variable contains the version of the oldest perl binary
3734 compatible with the present perl. perl.c:incpush() and
3735 lib/lib.pm will automatically search in $sitearch for older
3736 directories across major versions back to xs_apiversion.
3737 This is only useful if you have a perl library directory tree
3738 structured like the default one.
3739 See INSTALL for how this works.
3740 The versioned site_perl directory was introduced in 5.005,
3741 so that is the lowest possible value.
3742 Since this can depend on compile time options (such as
3743 bincompat) it is set by Configure. Other non-default sources
3744 of potential incompatibility, such as multiplicity, threads,
3745 debugging, 64bits, sfio, etc., are not checked for currently,
3746 though in principle we could go snooping around in old
3750 This variable is defined but not used by Configure.
3751 The value is a plain '' and is not useful.
3754 This variable is used internally by Configure to determine the
3755 full pathname (if any) of the zip program. After Configure runs,
3756 the value is reset to a plain "zip" and is not useful.